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.

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 +