Ampelaster

G. L. Nesom

Phytologia 77: 250. 1995.

Etymology: Greek ampelos, vine, alluding to habit, and generic name Aster
Basionym: Aster sect. Sagittiferi A. Gray in A. Gray et al., Syn. Fl. N. Amer. 1(2): 179. 1884
Synonyms: Aster sect. Caroliniani Small Lasallea subsect. Carolinianae (Small) Semple & Brouillet Virgulus sect. Sagittiferi (A. Gray) Reveal & Keener
Treatment appears in FNA Volume 20. Treatment on page 460. Mentioned on page 5, 458, 459, 466.
 TaxonIllustrator 
FNA20 P50 Canadanthus modestus.jpegCanadanthus modestus
Ampelaster carolinianus
Almutaster pauciflorus
Yevonn Wilson-Ramsey
Marjorie C. Leggitt
Yevonn Wilson-Ramsey

Shrubs, 100–400 cm (clambering, sprawling, or vinelike, deciduous or evergreen by production of new growth; sometimes clonal by adventitious-roots on branches in contact with soil, these becoming separated). Stems scandent, widely and diffusely branched, sparsely to densely short-pilose or hirsute, especially distally, eglandular. Leaves cauline; alternate; sessile; blades 1-nerved, elliptic or oblanceolate to lanceolate or ovate, margins entire, faces sparsely to moderately pilose. Heads radiate, in paniculiform arrays. Involucres turbino-campanulate, 8–12 × 8.5–21 mm. Phyllaries 30–50, in 5–6 series, spreading to reflexed, 1-nerved (midnerves ± raised, especially proximally, ± translucent yellowbrown to golden brown, less prominent distally; ± flat), outer linear-lanceolate to spatulate, inner linear-attenuate, strongly unequal, proximally whitish, herbaceous distally (green zone restricted to apical 1/4 or less), margins hyaline proximally (sometimes reddish), abaxial faces sparsely to moderately pilose. Receptacles flat to slightly rounded, pitted (margins irregular), epaleate. Ray-florets 30–50 (–70), pistillate, fertile; corollas pale rose-purple to pale-pink. Disc-florets 30–50, bisexual, fertile; corollas yellow becoming rose-purple, weakly ampliate, tubes shorter than narrowly cylindro-campanulate throats, lobes 5, erect, triangular; style-branch appendages narrowly triangular. Cypselae narrowly cylindric to fusiform, not compressed, 9–12-ribbed (whitish, raised), faces glabrous; pappi persistent, of 30–45, light stramineous to faintly rust-orange, barbellate bristles in 2 (–3) series (outermost of 0–5 midlength attenuate bristles, outer of long, distally attenuate ones, slightly shorter than inner weakly clavate ones). x = 9.

Distribution

se United States

Discussion

Species 1.

Selected References

None.

... more about "Ampelaster"
not tailed +, rounded +  and obtuse +
distinct +
subequal +
scarious +
usually triangular +  and linear +
usually deltate +  and lanceolate +
paniculiform +
indeterminate +  and determinate +
John C. Semple +
G. L. Nesom +
decurrent +
Aster sect. Sagittiferi +
oblanceolate;lanceolate or ovate +
rugulose +  and muricate +
not 2-lipped +  and actinomorphic +
yellow becoming rose-purple +, pale rose-purple +  and pale-pink +
ampliate +
not compressed +, narrowly cylindric +  and fusiform +
fertile +  and bisexual +
fertile +  and bisexual +
se United States +
Greek ampelos, vine, alluding to habit, and generic name Aster +
glabrous +  and pilose +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
linear-attenuate +
0.8 cm8 mm <br />0.008 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
turbino-campanulate +
0.85 cm8.5 mm <br />0.0085 m <br /> (2.1 cm21 mm <br />0.021 m <br />) +
triangular +
2-carpellate +
light stramineous +  and faintly rust-orange +
persistent +
spreading +  and reflexed +
bearing subulate enations +, hairy +  and bristly +
flat;slightly rounded +
exalbuminous +
eglandular +  and branched +
prostrate +  and ascending +
appendaged +  and truncate +
papillate +  and smooth +
Aster sect. Caroliniani +, Lasallea subsect. Carolinianae +  and Virgulus sect. Sagittiferi +
Ampelaster +
Asteraceae tribe Astereae +
cylindro-campanulate +
perennial +, biennial +  and annual +