Symphyotrichum subulatum (Michx.) G.L.Nesom

Extinction risk predictions for the world's flowering plants to support their conservation (2024). Bachman, S.P., Brown, M.J.M., Leão, T.C.C., Lughadha, E.N., Walker, B.E. https://nph.onlinelibrary.wiley.com/doi/full/10.1111/nph.19592

Conservation

Predicted extinction risk: not threatened. Confidence: confident

Bernal, R., Gradstein, S.R. & Celis, M. (eds.). 2015. Catálogo de plantas y líquenes de Colombia. Instituto de Ciencias Naturales, Universidad Nacional de Colombia, Bogotá. http://catalogoplantasdecolombia.unal.edu.co

Distribution

Cultivada en Colombia; Alt. 1900 - 2400 m.; Andes.

Morphology General Habit

Hierba

Ghazanfar, S. A., Edmondson, J. R. & Hind, D. J. N. (Eds). (2019). Flora of Iraq, Volume 6: Compositae.Kew Publishing

Morphology General Habit

Annual, 30–100 cm tall; stems slender, wiry, glabrous or thinly pilose upwards, often purplish-tinged, divergently branched above to form a usually large, many-headed panicle

Morphology Leaves

Leaves sessile, entire, linear to linear-oblanceolate or lower oblanceolate-spatulate, 5–10(–15) × 0.4–1 cm, obtuse, upper always narrow, obtuse or acute, glabrous or with scattered hairs

Morphology Reproductive morphology Inflorescences Bracts Involucre

Involucre rather narrow, narrowly campanulate to obconical, 5–8 mm; phyllaries green with pale membranous margins and pale midribs, unequal, passing into peduncular bracts, 0.5 mm wide, minutely glandular Involucre reflexed after fruit fall.

Ray

Ray florets female, 4–5 mm, ray limbs pale lavender to purple, finally circinnately coiled, shorter than to scarcely exceeding the pappus; disc-florets narrow, rather few, purplish-tipped at least when dry

Morphology Reproductive morphology Fruits

Achenes ± 2 mm, pubescent, light brown, ribbed; pappus dirty white, 5–6 mm

Ecology

In irrigated cultivation (alfalfa, corn, rice etc.), along ditches, river banks and roadsides, on loam, silty or sandy soil, often saline; alt. 10–68 m;

Phenology

flowering & fruiting: almost throughout the year.

Distribution

Locally common in the alluvial plains of Iraq, apparently rare in the foothills but may well spread rapidly especially along the great rivers. A native of N America, where it grows in saline, brackish or fresh coastal marshes; naturalized elsewhere.

George R. Proctor (2012). Flora of the Cayman Isands (Second Edition). Royal Botanic Gardens, Kew

Morphology General Habit

Erect annual herb up to 50 cm tall or more, glabrous or minutely puberulous; leaves elongate, narrowly oblanceolate, mostly 5–15 cm long, acuminate at the apex and long- tapered to the semi-clasping base, the margins entire or minutely serrulate

Morphology Reproductive morphology Flowers

Heads 5–8 mm broad in flower; phyllaries 2–5 mm long, glabrous or nearly so

Ray

Ray-florets white or very pale mauve; disc-florets light yellow, ca. 3.5 mm long

Morphology Reproductive morphology Fruits

Achenes thinly pubescent, 1–1.5 mm long; pappus of white bristles ca. 3 mm long.

Distribution

Grand Cayman. Southeastern U. S. A., Bahamas, Cuba, Jamaica and Mexico to Belize.

Ecology

Chiefly along roadsides and on moist disturbed soil.

IUCN Red List of Threatened Species https://www.iucnredlist.org/species/19035773/78457022

Conservation

LC - least concern