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104 results for “charophytes”
Fig. 7 in Charophytes of Australia's Northern Territory - II. Tribe Nitelleae
Fig. 7. Nitella heterophylla. (a–c) From specimen M.T.Casanova r460 (MEL). (d–i) From specimen M.T.Casanova p770 (PERTH). (a) Whole plant, scale: 1 cm. (b) Whorl of branchlets, scale: 1 mm. (c) Fertilised oogonium, scale: 200 µm. (d) Fertile female shoot, scale: 1 mm. (e) Fertile male shoot, scale: 1 mm. (f) Chromosomes in metaphase, 1000× magnification. (g) Scanning electron microscope (SEM) image of oospore in side view, scale: 100 µm. (h) SEM image of detail of oospore wall, scale: 20 µm. (i) SEM image of basal view of oospore, showing end-cell impressions on the oospore wall, scale: 100 µm.
Fig. 8. Nitella limosa from holotype specimen M.T.Casanova & J.Schult r738 in Charophytes of Australia's Northern Territory - II. Tribe Nitelleae
Fig. 8. Nitella limosa from holotype specimen M.T.Casanova & J.Schult r738 (DNA). (a) Habit of whole plant, scale: 1 cm. (b) Sterile whorl, scale: 10 mm. (c) Female fertile branchlet, scale: 500 µm. (d) Scanning Electron Microscope (SEM) image of oospore, scale: 200 µm. (e) SEM image of detail of oospore wall, scale: 20 µm. (f) SEM image of impression of end-cells on oospore wall, scale: 100 µm.
Fig. 16. Nitella tumulosa from specimen J.Schult t840 in Charophytes of Australia's Northern Territory - II. Tribe Nitelleae
Fig. 16. Nitella tumulosa from specimen J.Schult t840 (MEL). (a) Habit of whole plant, scale: 5 mm. (b) Apical whorls, scale: 1 mm. (c) Oogonium, scale: 100 µm. (d) Fertile whorl, scale: 1 mm. (e) Dactyls, scale: 0.2 mm. (f) Placement of gametangia, scale: 1 mm. (g) Light micrograph (LM) of oospore, scale: 100 µm. (h) LM of detail of oospore wall, scale: 20 µm. (i) Scanning electron microscope (SEM) image of oospore, scale: 100 µm. (j) SEM image of detail of oospore wall, scale: 20 µm.
Fig. 17 in Charophytes of Australia's Northern Territory - I. Tribe Chareae
Fig. 17. Chara protocharoides, (a–d, f–h) from H.B.S.Womersley, 28 Aug. 1947 (AD a5917a), (e) from M.T.Casanova r812. (a) Habit of plant; scale bar: 1 cm. (b) Whorl of antheridial branchlets; scale bar: 1 mm. (c) Branchlet tip with a single end cell; scale bar: 1 mm. (d) Branchlet node and antheridium; scale bar: 0.5 mm. (e) Oogonial branchlet whorl; scale bar: 1 mm. (f) Scanning electron micrograph (SEM) of oospore; scale bar: 200 µm. (g) SEM of detail of oospore wall; scale bar: 20 µm. (h) SEM of impression of end cell; scale bar: 100 µm.
Fig. 13 in Charophytes of Australia's Northern Territory - I. Tribe Chareae
Fig. 13. Chara karolii, from specimen (a) M.T.Casanova r931 and (b–j) M.T.Casanova r941. (a) Whole plant, with somewhat contracted fertile whorls; scale bar: 1 cm. (b) Whorl of branchlets; scale bar: 1 mm. (c) Transverse section of axis showing cortical cells; scale bar: 500 µm. (d) Gametangia arranged singly, with bract cells behind and beside the branchlet node, and bracteoles arising from the base of the gametangia; scale bar: 500 µm. (e) Branchlet tips with coronae; scale bar: 300 µm. (f) Clustered gametangia; scale bar: 500 µm. (g) Scanning electron micrograph (SEM) side view of oospore with eight striae; scale bar: 100 µm. (h, i) Detail of oospore wall, showing incomplete and complete development of reticulate ornamentation; scale bars: 20 µm. (j) End-cell impression on the oospore wall; scale bar: 50 µm. (k) Chromosomes in two spermatogenous cells in metaphase, at 1000× magnification, n = 14.
Fig. 10 in Charophytes of Australia's Northern Territory - I. Tribe Chareae
Fig. 10. Chara duriuscula, (a, d, f) from M.T.Casanova r773 (MEL), (b, i–k) from the holotype specimen F. v. Mueller 2 (LD), (c, g–h) from M.T.Casanova r781 (MEL), (e) from M.T.Casanova r774. (a) Habit of whole plant, scale bar: 10 mm. (b) Fertile branchlet whorl, scale bar: 1 mm. (c) Transverse section of axis, scale bar: 200 µm. (d) Fertile node with oosporangium, antheridium, bracteoles and bract cells, scale bar: 1 mm. (e) Whorl of stipulodes below the branchlets, scale bar: 1 mm. (f) Whorl of fertile branchlets, scale bar: 5 mm. (g) Young axis with spine cells. (h) Light micrograph of an oospore with evidence of calcification, ~500× magnification. (i) Scanning electron micrograph (SEM) of oospore with nine striae and a granulate fossa wall, scale bar: 100 µm. (j) SEM of oospore wall, scale bar: 20 µm. (k) SEM of pentagonal basal cell, scale bar: 50 µm.
Fig. 7 in Charophytes of Australia's Northern Territory - I. Tribe Chareae
Fig. 7. Chara bancroftii (a) from syntype specimen T.L.Bancroft 47 (LD); (b–i) from specimen M.T.Casanova r712. (a) Habit of whole plant, scale bar: 1 cm. (b) Female fertile whorl, scale bar: 5 mm. (c) Oogonium at branchlet node with bract cells and bractlet, scale bar: 0.5 mm. (d) Male fertile whorl, scale bar: 5 mm. (e) Base of whorl with stipulodes; scale bar: 1 mm. (f) Transverse section of the axis; scale bar: 0.5 mm. (g) Side view of oospore; scale bar: 100 µm. (h) Detail of oospore wall; scale bar: 20 µm. (i) View of oospore basal cell; scale bar: 50 µm.
Fig. 20 in Charophytes of Australia's Northern Territory - I. Tribe Chareae
Fig. 20. Chara submollusca, (a–i) from specimen M.T.Casanova r786 (MEL), (j–l) from isolectotype specimen J.Dallachy, Rockinghams Bay (BM). (a) Habit of female plant, scale bar: 10 mm. (b) Habit of male plant, scale bar: 10 mm. (c) Oogonia, bract cells and bractlets, scale bar: 500 μm. (d) Stipulodes at the base of the branchlets, scale bar: 1 mm. (e) Fertile female whorl of branchlets, scale bar: 5 mm. (f) Fertile male whorl of branchlets, scale bar: 1 mm. (g) Sterile whorl of branchlets, scale bar: 5 mm. (h) Bulbil consisting of the apex of a branch with starch-filled branchlet cells, scale bar: 1 mm. (i) Axis with partial cortication and inconspicuous spine cells, scale bar: 1 mm. (j) Scanning electronmicrograph (SEM) of oospore in side view, scale bar: 100 μm. (k) SEM of detail of oospore wall, scale bar: 20 μm. (l) SEM of impression of basal cell, scale bar: 100 μm.
Fig. 4. Lamprothamnium stipitatum from the holoype specimen M.T.Casanova r888 in Charophytes of Australia's Northern Territory - I. Tribe Chareae
Fig. 4. Lamprothamnium stipitatum from the holoype specimen M.T.Casanova r888 (PERTH). (a) Habit of whole plant, scale bar: 5 cm. (b) Fertile antheridial branchlet whorl, scale bar: 1 cm. (c) Fertile antheridial branchlet whorl with basal antheridia, scale bar: 1 cm. (d) Fertile female branchlet whorl, scale bar: 1 cm. (e) Coronula of triangular cells, scale bar: 100 µm. (f) Pair of oogonia on a branched stipe, scale bar: 100 µm. (g) Light micrograph of antheridal cells in metaphase, chromosomes n = 14, 1000× magnification, image enhanced and chromosomes outlined. (h) Scanning electron micrograph (SEM) of oospore, scale bar: 100 µm. (i) SEM of detail of oospore wall, scale bar: 20 µm. (j) SEM of basal cell impression, scale bar: 50 µm.
Fig. 6. Chara arnhemensis from the isotype specimen R.Specht A21 in Charophytes of Australia's Northern Territory - I. Tribe Chareae
Fig. 6. Chara arnhemensis from the isotype specimen R.Specht A21 (MEL). (a) Axis and branchlets of whole shoot, scale bar: 10 mm. (b) Section of axis with fertile branchlet whorl, scale bar: 1 mm. (c) Apex of a shoot, scale bar: 1 mm. (d) Transverse section of axis, scale bar: 100 µm. (e) Fertile branchlet with oogonia, antheridia, bracteoles and bract cells, scale bar: 1 mm. (f) Longitudinal view of axis with 2× cortication and long spine cells, scale bar: 1 mm. (g) Whorl of branchlets viewed from above, showing gametangia at the first branchlet nodes, scale bar: 1 mm. (h) Scanning electron micrograph (SEM) of whole oospore with 7 or 8 striae (damaged during preparation), scale bar: 50 µm. (i) SEM of felted, porate fossa wall, scale bar: 2 µm.
Fig. 3. Lamprothamnium compactum, from P.Dostine 12 in Charophytes of Australia's Northern Territory - I. Tribe Chareae
Fig. 3. Lamprothamnium compactum, from P.Dostine 12DW23-2. (a) Habit of elongate shoot, scale bar: 1 mm. (b) Compact shoot with antheridia, scale bar: 1 mm. (c) Fertile whorl, scale bar: 1 mm. (d) Sterile branchlet, scale bar: 100 µm.
Fig. 1 in Charophytes of Australia's Northern Territory - I. Tribe Chareae
Fig. 1. Lychnothamnus barbatus, (a, b, d) from R.D.Wood 60-11-21-3, (c, e) from Casanova & García v536, (f–h) from Bauer 1829 (BREM). (a) Habit of whole plant, scale bar: 10 mm. (b) Sterile whorl, scale bar: 10 mm. (c) Base of branchlet whorl, showing stipulodes and incomplete cortication, scale bar: 500 µm. (d) Fertile branchlet, scale bar: 5 mm. (e) Gametangia arranged side by side at branchlet node, scale bar: 500 µm. (f) Gyrogonite, scale bar: 200 µm. (g) Oospore, scale bar: 200 µm. (h) Detail of oospore wall, scale bar: 20 µm.
Fig. 12 in Charophytes of Australia's Northern Territory - I. Tribe Chareae
Fig. 12. Chara globularis, (a, b) from specimen M.T.Casanova p473, (c–g) from the undated lectotype specimen Thuillier (L), (h) from specimen M.T.Casanova p801. (a) Habit of whole plant, scale bar: 1 cm. (b) Immature gametangia, scale bar: 1 mm. (c) Branchlet whorl, scale bar: 1 mm. (d) Base of branchlet whorl with globular stipulodes and globular spine cells, scale bar: 1 mm. (e) Mature gametangia, scale bar: 1 mm. (f) Scanning electron micrograph (SEM) of oospore, scale bar: 100 µm. (g) SEM of detail of oospore wall, scale bar: 20 µm. (h) Light micrograph of antheridial cells in metaphase, n = 42, 1000× magnification.
Fig. 9. Chara benthamii A.Braun, from the isolectotype specimen I.Wilford 238 in Charophytes of Australia's Northern Territory - I. Tribe Chareae
Fig. 9. Chara benthamii A.Braun, from the isolectotype specimen I.Wilford 238 (BM). (a) Habit of whole plant, scale bar: 5 cm. (b) Fertile branch apex, scale bar: 10 mm. (c) Branchlet whorl, scale bar: 5 mm. (d) Fertile node with oosporangium, antheridium, bracteoles and bract cells, scale bar: 1 mm. (e) Transverse section of axial cortex, scale bar: 0.5 mm. (f) Oospore with 7–8 striae and a smooth fossa wall, scale bar: 100 µm. (g) Detail of oospore wall, scale bar: 20 µm. (h) Minutely patterned oospore wall construction, scale bar: 2 µm.
Fig. 8. Chara behriana, from R.Breen v053 in Charophytes of Australia's Northern Territory - I. Tribe Chareae
Fig. 8. Chara behriana, from R.Breen v053 (MEL). (a) Fertile branchlet whorl, scale bar: 5 cm. (b) Base of branchlet whorl and axis of shoot, scale bar: 1 mm. (c) Two fertile branchlet nodes, scale bar: 1 mm. (d) Transverse section of axis cortication, scale bar: 0.5 mm. (e) Base of branchlet whorl with the stipulodes, scale bar: 0.5 mm. (f) Longitudinal view of axis cortication and spine cells, scale bar: 1 mm. (g) Oospore, scale bar: 200 µm. (h) Detail of oospore wall, scale bar: 20 µm. (i) Impression of basal cell on the oospore, scale bar: 100 µm.
Fig. 5 in Charophytes of Australia's Northern Territory - I. Tribe Chareae
Fig. 5. Chara aridicola, (a–d) from M.T.Casanova P780, and (e–g) from the type specimen Mueller 5 (MEL). (a) Habit of upper axis of plant, scale bar: 5 mm. (b) Branchlet whorl, scale bar: 1 mm. (c) Gametangia, with bracteoles and bract cells; scale bar: 100 µm. (d) Transverse section of axis, scale bar: 0.5 mm. (e) Oospore in side view; scale bar: 200 µm. (f) Detail of oospore wall; scale bar: 2 µm. (g) Base of oospore; scale bar: 50 µm.
Fig. 22 in Charophytes of Australia's Northern Territory - I. Tribe Chareae
Fig. 22. Chara zeylanica, (a–e) from A.T.Hotchkiss X-251, (b, f–g) from the isotype specimen J.Klein 508 (HBG), (h) from S.Townsend p56 Daly RIver (MEL). (a) Habit of whole plant, scale bar: 5 cm. (b) Axis with 3× cortex and spine cells, scale bar: 0.5 mm. (c) Fertile branchlets, scale bar: 1 cm. (d) Base of branchlet whorl with uncorticated basal branchlet cells (upper row of stipulodes removed), scale bar: 1 mm. (e) Gametangia with oosporangium, tetrascutate antheridium, bracteoles and bract cells on a corticated branchlet, scale bar: 500 µm. (f) Scanning electron micrograph (SEM) of oospore, scale bar: 200 µm. (g) SEM of detail of oospore wall, scale bar: 20 µm. (h) SEM of impression of end cell on oospore wall, scale bar: 100 µm.
Fig. 15 in Charophytes of Australia's Northern Territory - I. Tribe Chareae
Fig. 15. Chara lucida, (a–d) from M.T.Casanova r784, (e) from L.A.Craven 4782 and (f–h) from the Victoria River specimen F. v. Mueller 5. (a) Habit of whole plant; scale bar: 5 mm. (b) Fertile oogonial whorl, scale bar: 5 mm. (c) Final two branchlet cells, scale bar: 0.5 mm. (d) Oosporangium; scale bar: 100 µm. (e) Fertile antheridial branchlet whorl, scale bar: 5 mm. (f) Scanning electron micrograph (SEM) of oospore; scale bar: 200 µm. (g) SEM of detail of oospore wall; scale bar: 50 µm. (h) SEM of impression of baseal cell on the oospore; scale bar: 100 µm.
Fig. 14. Chara lamprothamniformis, from specimen T.S.Henshall 979 in Charophytes of Australia's Northern Territory - I. Tribe Chareae
Fig. 14. Chara lamprothamniformis, from specimen T.S.Henshall 979 (DNA), (a) female fertile whorl, scale bar: 1 mm. (b) Male fertile whorl, scaleb bar: 1 mm. (c) Longitudinal view of axis, scale bar: 100 μm. (d) Fertile branchlet node with geminate oogonia, bract cells, bracteoles, and bractlet, scale bar: 0.5 mm. (e) Antheridium with smaller bract cells and bracteoles, scale bar: 0.5 mm. (f) Single oosporangium with bract cells, bractoles and bractlet, scale bar: 0.5 mm. (g) Scanning electron micrograph (SEM) of oospore, scale bar: 100 µm. (h) SEM of detail of oospore wall, scale bar: 20 µm. (i) SEM of detail of the impression of the basal cell on the oospore wall, scale bar: 50 µm.
Fig. 2. Lamprothamnium capitatum, from C.P.Mangion 278 in Charophytes of Australia's Northern Territory - I. Tribe Chareae
Fig. 2. Lamprothamnium capitatum, from C.P.Mangion 278. (a) Axis of mature, fertile plant, scale bar: 10 mm. (b) Two sexually reproducing nodes showing internal and external basal oogonia and foliar antheridia, scale bar: 1 mm. (c) Fertile branchlet with stipitate oogonia and geminate antheridia, scale bar: 1 mm. (d) Part of an axis node with long-stipitate oosporangia at the base of branchlets, scale bar: 500 µm.
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