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4,287 results for “Asteraceae”
Malacothrix stebbinsii (Asteraceae) - inflorescence - lateral view of flower
Image of Malacothrix stebbinsii (Asteraceae) - inflorescence - lateral view of flower
Eupatorium purpureum (Asteraceae) - stem - showing leaf bases
Image of Eupatorium purpureum (Asteraceae) - stem - showing leaf bases
Malacothrix stebbinsii (Asteraceae) - inflorescence - lateral view of flower
Image of Malacothrix stebbinsii (Asteraceae) - inflorescence - lateral view of flower
Malacothrix stebbinsii (Asteraceae) - leaf - on upper stem
Image of Malacothrix stebbinsii (Asteraceae) - leaf - on upper stem
Malacothrix stebbinsii (Asteraceae) - stem - showing leaf bases
Image of Malacothrix stebbinsii (Asteraceae) - stem - showing leaf bases
Malacothrix stebbinsii (Asteraceae) - inflorescence - closeup of flower interior
Image of Malacothrix stebbinsii (Asteraceae) - inflorescence - closeup of flower interior
Malacothrix stebbinsii (Asteraceae) - inflorescence - frontal view of flower
Image of Malacothrix stebbinsii (Asteraceae) - inflorescence - frontal view of flower
FIGURE 2 in Taxonomic Identity of Gamochaeta americana and Gamochaeta coarctata (Gnaphalieae, Asteraceae)
FIGURE 2. Cluster analysis of the whole set of 99 specimens of Gamochaeta americana and Gamochaeta coarctata, using a matrix calculated from 24 characters (Gower's coefficient of similarity).
FIGURE 4. Gamochaeta americana. A in Taxonomic Identity of Gamochaeta americana and Gamochaeta coarctata (Gnaphalieae, Asteraceae)
FIGURE 4. Gamochaeta americana. A. Habit; B. Foliar trichomes; C. Capitulum; D. Inner phyllaries; E. Pistillate floret; F. Bisexual floret; G. Stamen; H. Style branches; I. Achene; J. Globose duplex hair; K. Pappus. [From Freire (1998: 31, fig. 8).]
FIGURE 5 in Taxonomic Identity of Gamochaeta americana and Gamochaeta coarctata (Gnaphalieae, Asteraceae)
FIGURE 5. Habit of Gamochaeta americana with basal leaves in rosettes, bicolored leaves with leaf margins wavy, and capitula in clusters in the axils of the upper leaves, arranged in dense elongated spikes interrupted at the base (Argentina; photograph by J.F. Pensiero, UNL, Argentina).
FIGURE 3 in Taxonomic Identity of Gamochaeta americana and Gamochaeta coarctata (Gnaphalieae, Asteraceae)
FIGURE 3. Principal Coordinate Analysis (PCoA) plot showing variation among the 99 specimen of Gamochaeta americana (blue squares) and Gamochaeta coarctata (red circles), based on 24 analyzed characters.
FIGURE 1 in Taxonomic Identity of Gamochaeta americana and Gamochaeta coarctata (Gnaphalieae, Asteraceae)
FIGURE 1. Codes for the apices of inner phyllaries. ACM, acuminate (Bayer ARG-02004 LP); AC, acute (Pedersen 6292 LP); SO, subobtuse (Grüner 130 LP, Dawson 32726 LP); OB, obtuse (Cabrera 5780 LP); RA, rounded-apiculate (Cabrera 114 LP); RO, rounded (Dawson 760 LP, Cabrera 327 LP). [Modified from Freire et al. (2016: 264, fig. 7D).]
FIGURE 1 in A new species of Heterocondylus (Eupatorieae, Asteraceae) from Serra do Brigadeiro, Minas Gerais, Brazil
FIGURE 1. Heterocondylus penninervius (Isotype HUFU): A. Habit. B. Leaf, abaxial surface with pinnate venation. C. Capitula. D. Receptacle with the scars of carpopodium insertions. E–H. Phyllaries (outer, intermediate and inner). I. Corolla. J. Anther. K. Style. L. Cypsela and pappus.
Seed size and capitulum position drive germination and dormancy responses to projected warming for the threatened dune endemic Cirsium pitcheri (Asteraceae)
<p>Among coastal plant species at risk from rapid environmental changes is the North American Great Lakes dune endemic Cirsium pitcheri. Despite being listed as federally threatened, little is known about how C. pitcheri seed attributes influence germination and dormancy-break patterns in the context of climate change. Following a previous work where we found differences in the number and weight of C. pitcheri seeds among capitulum positions and study sites, here we examine the effects of seed attributes (capitulum position, seed weight and site of origin) on the proportion and timing of C. pitcheri seed germination under temperature treatments that simulate projected warming in the Great Lakes (20/10°C, 25/10°C and 30/10°C day/night). Our results demonstrate that C. pitcheri produces diverse cohorts of seeds with seed attributes that significantly influence the timing and probability of germination over a three-year soil seed bank. C. pitcheri seed germination proportions were highest at 20°C and decreased successively at 25°C and 30°C. Seeds from terminal capitula had higher germination proportions and took longer to germinate than those from secondary capitula. The effect of seed weight on germination probability also depended on site of origin and capitulum position, with all effects varying in size and significance over time. Our results highlight the considerable differences in germination patterns exhibited by seeds from different capitulum positions and sites of origin and provide insight into the dormancy-break patterns that C. pitcheri might experience under the predicted temperature rise in the Great Lakes region of North America.</p>
FIGURE 2. Lychnophora osanyiniana. A. Habitat and habit. B. Specimen occurrence habitat. C in Flowers to Òsanyìn: Lychnophora osanyiniana (Asteraceae: Vernonieae) a new "arnica da serra" from Minas Gerais, Brazil
FIGURE 2. Lychnophora osanyiniana. A. Habitat and habit. B. Specimen occurrence habitat. C. Detail of leaves. D. Glomerule with mature florets. E. Glomerule surrounded by subinvolucral bracts. A–E. by P.B. Meyer.
FIGURE 2 in A new species of Osteospermum subgen. Tripteris (Asteraceae: Calenduleae) from the Namib Desert, Namibia
FIGURE 2. Osteospermum namibense: di- and trichotomous branching. A. Live plant. B. Woody remains of a dead plant. Photographs by W. Swanepoel.
FIGURE 1 in A new species of Osteospermum subgen. Tripteris (Asteraceae: Calenduleae) from the Namib Desert, Namibia
FIGURE 1: Osteospermum namibense: Habit and habitat. A. Plant, ca. 0.4 m high, with dead leaves persisting on older stems. B. Plant partially buried by windblown sand; note leaves arranged in rosettes. Photographs by W. Swanepoel.
FIGURE 3 in A new species of Osteospermum subgen. Tripteris (Asteraceae: Calenduleae) from the Namib Desert, Namibia
FIGURE 3. Osteospermum namibense: flower and fruiting heads, as well as leaves. A. Flower head viewed from above, with two visiting flies in the family Diptera: Mythicomyiidae. B. Leaves and side view of flower head; note succulence of leaves and sand grains sticking to gland-covered surfaces. C. Fruiting head with mature achenes. Photographs by W. Swanepoel.
FIGURE 1 in Morphology and morphometry support a single species in the Leucheria cerberoana species complex (Asteraceae, Nassauvieae)
FIGURE 1. Phyllaries and pappus of the species of Leucheria under study. a. Capitulum transection showing two florets tightly enclosed by an inner enfolding phyllary (arrows) (LP 6022). b. Marginal floret tightly enclosed by an outer keeled phyllary and an enfolding inner phyllary (Barros 2653, LP). c. Short pappus of marginal floret (Zöllner 3682, LP). d. Long pappus of central floret (Zöllner 3682, LP). Scale bars: a = 375 µm; b = 3 mm; c–d = 0.5 mm.
FIGURE 3 in Morphology and morphometry support a single species in the Leucheria cerberoana species complex (Asteraceae, Nassauvieae)
FIGURE 3. Character variation of Leucheria specimens in multivariate space based on Principal Coordinate Analysis (PCoA) and K- means. a. Distribution of individual specimens (circles) in multivariate space (first three PCoA axes). The different colors represent different species to which the specimens were assigned. b. Characters (vectors) accounting for most variation of the first three PCoA axes (correlations greater than 0.5 and lower than -0.5). c. Number of clusters vs. within sum of squares resulting from K-means. BASA = blade abaxial surface araneose, BASL = blade abaxial surface lanose, BP = blade pinnatisect, BS = blade slightly partite, LLR = lower leaves rosulate, PP = phyllary pubescence, PT = peduncle thickened, PNT = peduncle non-thickened, SP = stem pubescence.
ScienceDex guides
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These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.