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43 results for “Acanthopsis”
Figure 10 in Notes on morphological characteristics and life history strategy of the genus Acanthopsis Harv. (Acanthaceae)
Figure 10. SEM and stereomicroscope images of Acanthopsis seeds, showing appressed hygroscopic hairs when dry and uncoiled mucilaginous hairs upon wetting. A and B, appressed hairs of seed (dried state), A. dregeana subsp. longispina (Steyn 2141, PRE); C, seed with uncoiled hairs upon wetting, A. disperma (Steyn 1845, PRE); D, uncoiled hair showing helical thickening of walls, A. disperma (Steyn 1845, PRE); E, uncoiled hairs stained with safranin, A. disperma (Steyn 1845, PRE); F, seedling, A. hoffmannseggiana typical form (Steyn 2148, PRE). Scale bar: A = 300 µm, B = 80 µm, C= 1 mm, D = 30 µm, E. 50 µm, F = 2 mm.
Figure 8 in Notes on morphological characteristics and life history strategy of the genus Acanthopsis Harv. (Acanthaceae)
Figure 8. Insects observed on Acanthopsis flowers. A, fruit fly on A. hoffmannseggiana; B, fruit fly and ant on A. nitida; C, long-proboscid bee fly probing a flower of A. tuba. Photograph: A, B, the authors; C, F. Grenier.
Figure 4 in Notes on morphological characteristics and life history strategy of the genus Acanthopsis Harv. (Acanthaceae)
Figure 4. Corolla of Acanthopsis flowers showing colour variation. A, A. glauca; B, A. horrida; C, A. hoffmannseggiana; D, A. scullyi. Photographs: A, B, M. Koekemoer; C, D, the authors.
Figure 3 in Notes on morphological characteristics and life history strategy of the genus Acanthopsis Harv. (Acanthaceae)
Figure 3. Corolla, androecium and gynoecium of Acanthopsis flowers. A, corolla, A. tuba (Von Staden 9139); B, corolla, A. horrida (Koekemoer 4370, PRE); C, androecium, A. horrida (Koekemoer 4370, PRE); D, gynoecium and one lateral sepal of calyx; note the tuft of glandular hairs at base of style, A. scullyi (Steyn 1911, PRE). Scale bar: A, B = 10 mm, C, D = 1 mm. Artist: Daleen Roodt.
Figure 1 in Notes on morphological characteristics and life history strategy of the genus Acanthopsis Harv. (Acanthaceae)
Figure 1. Different habits found in Acanthopsis. A, acaulescent herb; B, compact subshrub; C, shrublet (cushion-shaped); D, shrublet (virgate). Photographs: A, B, the authors; C, D: M. Koekemoer.
Figure 5 in Notes on morphological characteristics and life history strategy of the genus Acanthopsis Harv. (Acanthaceae)
Figure 5. Androecium of Acanthopsis disperma flowers. A, stout filaments; B, anthers and style; C and D, anthers, showing long hairs and pollen grains exposed on the side facing the corolla lip. Scale bar: A = 0.8 mm, B = 0.7 mm, C = 0.5 mm, D = 0.2 mm.
FIG. 5 in Taxonomic significance of trichomes in the genus Acanthopsis Harv. (Acanthaceae, tribe Acantheae)
FIG. 5. — Light microscope images illustrating different trichome types on leaves and bracts (abaxial surface) of different taxa of Acanthopsis: A. Bract,A. hoffmannseggiana typical form,Type C, G (Steyn 2148); B, Leaf,A. hoffmannseggiana typical form, Type G (Steyn 2148); C, Bract,A. hoffmannseggiana typical form, Type G (Steyn 2148); D, Bract,A. hoffmannseggiana typical form, Type C (Steyn 2148); E, Bract, A. hoffmannseggiana typical form, Type E (Steyn 2148); F, Leaf, A. scullyi, Type C (Steyn 2134); G, Leaf, A. hoffmannseggiana typical form, Type B (Steyn 2148); H, Leaf, A. disperma Type B (Steyn 1852). Scale bars: A, 100 µm; B, C, F, H, 50 µm; D, E, G, 20 µm.
FIG. 4 in Taxonomic significance of trichomes in the genus Acanthopsis Harv. (Acanthaceae, tribe Acantheae)
FIG. 4. — Light microscope images illustrating different trichome types on leaves (abaxial surface) of different taxa of Acanthopsis: A, A. horrida, Type A1, E,F (Steyn 2121); B, C, A. glauca, Type A2 (Steyn 2143); D, A. dispermoides, Type A1, B (Steyn 1912); E, A. scullyi, Type D (Steyn 2134). Scale bars: A, 100 µm; B, C, 20 µm; D, E, 50 µm.
FIG. 3 in Taxonomic significance of trichomes in the genus Acanthopsis Harv. (Acanthaceae, tribe Acantheae)
FIG. 3. — SEM images of bract indumentum (abaxial surface) and predominant trichome types of different taxa of Acanthopsis: A, A. disperma, Type E on blade, Type C on margin (Koekemoer 4187); B, A. horrida, Type F (Steyn 2121); C, A. hoffmannseggiana typical form, Type G (Steyn 1895); D, A. pagodiformis, Type C (Steyn 2147); E, A. glandulopalmata, Type A (Steyn 2125); F, A. scullyi, Type D (Steyn 2139). Scale bars: 100 µm.
FIG. 2 in Taxonomic significance of trichomes in the genus Acanthopsis Harv. (Acanthaceae, tribe Acantheae)
FIG. 2. — SEM images of leaf indumentum and predominant trichome types of various taxa of Acanthopsis: A, A. dregeana subsp. longispina, Type A2 (Steyn 2141); B, A. hoffmannseggiana typical form, Type A1 (Steyn 758); C, A. disperma, Type B (Steyn 1845); D, A. horrida, Type F (Steyn 2121); E, A. villosa, Type D (Koekemoer 4398); F, A. nitida, Type A1 (Steyn 1884). Scale bars: A, B, D, 100 µm; C, E, F, 20 µm.
FIG. 1 in Taxonomic significance of trichomes in the genus Acanthopsis Harv. (Acanthaceae, tribe Acantheae)
FIG. 1. — Trichome types (A1-G; illustrations labelled accordingly) found in Acanthopsis; as seen in surface view,unless indicated otherwise.A1 (bottom), non-glandular, unicellular trichome, A. glandulopalmata, leaf (Steyn 2125); A1 (top), optical section, A. horrida, leaf (Steyn 2121); A2, non-glandular, unicellular trichome, A. dregeana subsp. longispina, leaf (Steyn 2141); B, non-glandular, multicellular trichome, A. hoffmannseggiana Pofadder form, leaf (Steyn 1908); C, optical section, non-glandular, unicellular trichome,A. disperma, bract (Steyn 1845); D, non-glandular, multicellular trichome,A. villosa, leaf (Koekemoer 4398); E, glandular,uni- or multicellular trichome with or without 1-celled stalk, A. glandulopalmata, leaf (Steyn 2125); F, glandular, multicellular trichome with 2 (or 3)-celled stalk, A. glandulopalmata, leaf (Steyn 2125); G, glandular, multicellular trichome with 3-celled stalk and viscid head, A. hoffmannseggiana typical form, bract (Steyn 1915). Scale bar: 50 µm. Artist: Elizma Fouché.
FIGURE 10 in Taxonomic notes on the Acanthopsis disperma-hoffmannseggiana complex (Acanthaceae, tribe Acantheae), with an interim key to members of the genus
FIGURE 10. Acanthopsis dispermoides: morphology. A & B. Habit. C & D. Leaf indumentum. E–G. Bract. H. Calyx. I. Flower (corolla lobes blue-purple; throat white). J. Glandular hairs at base of style. K. Capsule. L. Seed. Vouchers: C, E, G–J = Steyn 1912 (PRE), D, F, K, L = Boucher PRE 40576 (PRE).
FIGURE 9 in Taxonomic notes on the Acanthopsis disperma-hoffmannseggiana complex (Acanthaceae, tribe Acantheae), with an interim key to members of the genus
FIGURE 9. Acanthopsis disperma: morphology. A–C. Habit. D & E. Leaf indumentum. F & G. Bract. H. Calyx. I. Flower (corolla lobes blue-purple; throat white). J. Glandular hairs at base of style. K. Part of capsule and seed. L. Seed. Vouchers: D = Koekemoer 4183 (PRE), E = Steyn 1686 (PRE), F, G = Drège s.n (K), H, I = Steyn 1845 (PRE), J = Koekemoer 4187 (PRE), K, L = Van der Westhuizen 236 (PRE). Photographs: M. Koekemoer (A–C).
FIGURE 8 in Taxonomic notes on the Acanthopsis disperma-hoffmannseggiana complex (Acanthaceae, tribe Acantheae), with an interim key to members of the genus
FIGURE 8. Acanthopsis hoffmannseggiana: morphology. A–C. Habit. D & E. Leaf indumentum. F & G. Bract. H. Calyx. I. Flower (corolla lobes variable colours; throat white or cream). J. Base of style. K. Capsule. L. Seed. Vouchers: D–G = De Winter 3558 (PRE), H = Steyn 1915 (PRE), I, J = Steyn 1895 (PRE), K, L = Smith PRE40539 (PRE). Photograph: M. Koekemoer (B).
FIGURE 7 in Taxonomic notes on the Acanthopsis disperma-hoffmannseggiana complex (Acanthaceae, tribe Acantheae), with an interim key to members of the genus
FIGURE 7. Acanthopsis villosa: morphology. A & B. Habit. C & D. Leaf indumentum. E–G. Bract. H. Calyx. I. Flower (corolla lobes blue-purple; throat white to cream). J. Glandular hairs at base of style. K: Seed. Vouchers: C–J = Koekemoer 4398 (PRE), K = Marloth ex Meyer 6395 (PRE). Photographs: N. Helme (A), M. Koekemoer (B).
FIGURE 6 in Taxonomic notes on the Acanthopsis disperma-hoffmannseggiana complex (Acanthaceae, tribe Acantheae), with an interim key to members of the genus
FIGURE 6. Acanthopsis adamanticola: morphology. A & B. Habit. C & D. Leaf indumentum. E–G. Bract. H. Calyx. I. Flower (corolla lobes blue-purple; throat white). J. Glandular hairs at base of style. K: Part of capsule and seed. Vouchers: C, E–J = Germishuizen 10074 (PRE), D = Bartsch, Loots & Mannheimer SB1010 (WIND), K = Smook 11204 (PRE). Photographs: C. Mannheimer (A & B).
FIGURE 5 in Taxonomic notes on the Acanthopsis disperma-hoffmannseggiana complex (Acanthaceae, tribe Acantheae), with an interim key to members of the genus
FIGURE 5. Acanthopsis ludoviciana: morphology. A–C. Habit. D & E. Leaf indumentum. F–H. Bract. I. Calyx. J. Flower (corolla lobes blue-purple; throat lemon-yellow). K. Glandular hairs at base of style. L. Seed. Vouchers: D, E, G, K, L = Steyn 1814b (PRE), F, H = Koekemoer 4370 (PRE), I, J = Steyn 1818 (PRE). Photographs: M. Koekemoer (A–C).
FIGURE 2 in Taxonomic notes on the Acanthopsis disperma-hoffmannseggiana complex (Acanthaceae, tribe Acantheae), with an interim key to members of the genus
FIGURE 2. Floral bracts illustrating the terminology used. Examples are marked of basal secondary spines (*) and marginal secondary spines (°). A. Bract with simple central primary spine (arrowed). B. Bract with compound central primary spine (arrowed). See text for more details. Artist: Gillian Condy.
FIGURE 1 in Taxonomic notes on the Acanthopsis disperma-hoffmannseggiana complex (Acanthaceae, tribe Acantheae), with an interim key to members of the genus
FIGURE 1. Known distribution of species within the Acanthopsis disperma-hoffmannseggiana complex. A: A. ludoviciana (●) and A. tuba (Δ), B: A. adamanticola (▲), A. disperma (○), A. dispermoides (□), A. hoffmannseggiana (■) and A. villosa (ۗ).
FIGURE 3 in Taxonomic notes on the Acanthopsis disperma-hoffmannseggiana complex (Acanthaceae, tribe Acantheae), with an interim key to members of the genus
FIGURE 3. Comparison of floral parts in members of the Acanthopsis disperma-hoffmannseggianna species complex (from left to right): bract(s) (abaxial views), bracteoles, calyx (4 sepals) and flower. A. A. tuba. B. A. ludoviciana. C. A. adamanticola. D. A. villosa. E. A. hoffmannseggiana. F. A. disperma. G. A. dispermoides. Note: if two bracts per species are illustrated, the one on the left is from lower down in the same inflorescence. Scale bar = 10 mm. Vouchers: A = Von Staden CNR 9139 (PRE), B = Koekemoer 4370 (PRE), C = Germishuizen 10074 (PRE), D = Koekemoer 4398 (PRE), E = Steyn 1907 (PRE), F = Koekemoer 4187 (PRE), G = Steyn 1912 (PRE).
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