perennial, 5 to 12 dm. Glandular, ill-scented with purple
Distribution: Found in moist, often saline valley bottoms, from
Bay to the Atlantic Coast, Caribbean and northern South America.
Seed: Achene 1 mm. long, minutely rough-hairy; with long, slender pappus
AOSA: PSU# 50 - Intact achene, with or without one or
more of the following structures: beak, bristle, hairs, pappus,
wing, or firmly attached floral remnants, provided a true seed
with some degree of embryo development can be detected (either
by slight pressure or by examination over light).
Piece of broken achene larger than one-half of the original
size, unless no seed is present. Seed, with or without
pericarp/seed coat; if broken, larger than one-half the original
ISTA: PSD #4 – Achene, with or without pappus, unless it is
obvious that no seed is present.
Average pure seed units per gram:
36,695 seeds per gram (based on AOSA pure seed units only from
23 samples received for testing from 1996 to 2004).
Range of percent pure seed:
14% to 57%
Range of percent inert: 42% to 85%
Description of inert: Plant material, sticks, dead insects.
Planting instructions: 400
seeds, TB, 21 days @ 20-30°C; for fresh and dormant seed,
to main reference page)
Hickman, J.C., Ed. 1993. p. 326.
Ransom Seed Laboratory