Fimbristylis squarrosa

Vahl

Enum. Pl. 2: 289. 1805.

IntroducedIllustrated
Synonyms: Fimbristylis comata Nees Fimbristylis hirta (Kunth) Roemer & Schultes Isolepis hirta Kunth Pocronostylis squarrosus (Vahl) Bertoloni
Treatment appears in FNA Volume 23. Treatment on page 127. Mentioned on page 122, 128.

Plants annual, cespitose, delicate, to 30 (–40) cm, bases soft; rhizomes absent. Leaves polystichous, spreading to ascending, to 1/2 length of culms or longer; sheaths entire or ciliate distally, backs hirtellous; ligule absent; blades linearfiliform, 0.5 mm wide, flat or involute, scabridciliate, often abaxially hirtellous. Inflorescences: anthelae simple or compound, mostly open, ascending-branched, mostly longer than broad; scapes filiform, 0.5 mm wide, distally compressed, mostly glabrous; longer involucral-bracts leafy, equaling or exceeded by anthela. Spikelets greenish brown or brownish, lanceoloid or narrowly ellipsoid-cylindric, 4–5 mm; fertile scales ovate, acute, glabrous, midrib excurrent as slender, excurved cusp. Flowers: stamens 1; styles 2-fid, slender, base flat, long-fimbriate, hairs recurved over achene summit. Achenes pale-brown, lenticular, obovoid, 0.9 mm, smooth or very finely reticulate.


Habitat: Moist sands or silts, low clearings, fields
Elevation: low to high elevations

Distribution

V23 196-distribution-map.jpg

Introduced; N.J., West Indies (Cuba), Central America (Honduras), South America, Asia, Africa, Indian Ocean Islands, Pacific Islands

Discussion

Fimbristylis squarrosa is an Old World temperate to tropical weed, mostly of Asia and Africa.

While Fimbristylis squarrosa has been collected only once in North America from ballast at Camden, New Jersey (C. F. Parker, in 1865), the weedy and often ruderal nature of the species makes it a likely future adventive.

Selected References

None.

Lower Taxa

None.

"shortened" is not a number."lengthofculms" is not declared as a valid unit of measurement for this property. "/2lengthofculms" is not declared as a valid unit of measurement for this property.

... more about "Fimbristylis squarrosa"
reticulate-honeycombed +
obovoid;lenticular +
ascending-branched +, open +, compound +  and simple +
mostly longer than broad +
Robert Kral +
hirtellous +
deciduous +
long-fimbriate +
enlarged +
involute +  and flat +
0.5 cm5 mm <br />0.005 m <br /> (?) +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
parallel +  and divergent +
terete +, rolled +  and plicate +
3-5-angled +, compressed +  and terete +
excurved +
slender +
N.J. +, West Indies (Cuba) +, Central America (Honduras) +, South America +, Asia +, Africa +, Indian Ocean Islands +  and Pacific Islands +
low to high elevations +
hypogynous +  and subtending +
biconvex +  and trigonous +
Moist sands or silts, low clearings, fields +
interrupted +  and continuous +
compound +  and simple +
erect +  and spreading +
polystichous +
spreading;ascending +
exceeded by anthela +  and equaling +
with (1-)3-6(-30) bristles and/or scales +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
adventitious +
basal +  and proximal +
acute;ovate +
compressed +  and filiform +
cylindric +
Introduced +  and Illustrated +
brownish +  and greenish brown +
single +, 1 +  and 80 +
ellipsoid-cylindric;lanceoloid +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
slender +
Fimbristylis comata +, Fimbristylis hirta +, Isolepis hirta +  and Pocronostylis squarrosus +
Fimbristylis squarrosa +
Fimbristylis +
species +
not +  and rhizomatous +
30 cm300 mm <br />0.3 m <br /> (40 cm400 mm <br />0.4 m <br />) +
plant +  and cespitose +