Pterocaulon virgatum
in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 5: 454. 1836.
Common names: Wand blackroot
Illustrated
Basionym: Gnaphalium virgatum Linnaeus Syst. Nat. ed. 10, 2: 1211. 1759
Plants 4–15 dm. Leaf-blades linear to narrowly elliptic or linear-lanceolate, 5–10 (–15) cm × (2–) 5–10 (–14) mm, lengths mostly 6–8 times widths, margins entire or minutely denticulate (revolute). Heads in open, interrupted, ± cylindric arrays (5–) 8–20 cm (main axes visible between glomerules of heads). Involucres campanulate to cylindric, 4–5 mm. Pistillate florets 25–50. Functionally staminate florets 2–4 (–5). Cypselae 1–1.4 mm.
Phenology: Flowering Aug–Oct.
Habitat: Marshy areas, ditches, moist places in woods, in sand, sandy loam, and sandy clay
Elevation: 0–20 m
Distribution
La., Tex., Mexico (Tamaulipas), West Indies, Central America, South America
Discussion
Selected References
None.
Lower Taxa
None.
... more about "Pterocaulon virgatum"
whitish-tomentose +
tailed +
introrse +
connate +
obtuse;rounded +
scarious +
hirsute +
papillate +
spiciform +
continuous +
decurrent +
obovate;elliptic +
ribbed;smooth +
stigmatic +
barbellulate +
distinct +
absent +
Wand blackroot +
not 2-lipped +
yellowish +
monomorphic +
not beaked +
1mm;1.4mm +
staminate +
bisexual +
straight +
sessile-glandular +
distinct +
proximal +
2;4 +
bisexual +
dispersed +
disciform +
singly +
indeterminate +
heterogamous +
Present +
winged +
surrounding +
campanulate;cylindric +
linear-lanceolate;elliptic +
5mm;10mm +
sessile +
alternate +
cauline +
deltate +
2-carpellate +
inferior +
attached +
anatropous +
persistent +
falling +
tough +
thick +
fertile +
connate +
persistent +
distinct +
falling +
unequal +
in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. +
1836 +
absent +
epaleate +
flat;convex +
fibrous +
setiform +
exalbuminous +
modifed +
1;2 +
Illustrated +
alternate +
simple +
erect +
2-branched +
hairy +
papillate +
Pterocaulon virgatum +
Pterocaulon +
species +
perennial +