Austrostipa

S.W.L. Jacobs & J. Everett
Treatment appears in FNA Volume 24. Treatment on page 184.
 TaxonIllustrator 
FNA24 P72 Austrostipa pg 186.jpegAustrostipa elegantissima
Austrostipa ramosissima
Cindy Roché
Cindy Roché

Plants facultative perennials; to 2.5 m, sometimes shrublike, often with knotty bases. Culms often persistent, sometimes geniculate at the base, sometimes with stiff branches at the upper nodes; basal branching usually extravaginal; prophylls not evident. Leaves not overwintering; sheaths open to the base, margins sometimes extending beyond the base of the ligule, the extensions often conspicuously hairy, sometimes grading into the ligule; auricles not present; ligules membranous; blades flat, convolute, or terete, usually scabrous, sometimes pubescent, those of the flag leaves longer than 10 mm, bases usually as wide as the top of the sheaths, sometimes narrower. Inflorescences panicles, sometimes contracted, rachises persistent or disarticulating whole at maturity; pedicels smooth or scabrous, sometimes hairy, hairs to 3 mm; disarticulation above the glumes, sometimes also at the base of the panicle. Spikelets with 1 floret; rachillas not prolonged. Glumes usually longer than the florets, narrow, more or less keeled, hyaline to chartaceous, 1-5 (7) -veined, apices usually acute or acuminate, rarely muticous or mucronate, remaining open after the floret falls; florets at least 5 times longer than wide; calluses strigose, usually sharp; lemmas usually coriaceous or indurate, 3-5 (7) -veined, margins thin, usually convolute, rarely involute, apices glabrous or pilose, with 0-2 minute to small, membranous lobes, awned, lemma-awn junction evident; awns once or twice-geniculate; paleas from shorter than to subequal to the lemmas, flat between the veins, 0-2-veined; lodicules 3 or 2; anthers 3, frequently penicillate; ovaries glabrous. Caryopses fusiform, terete; hila linear, nearly as long as the caryopses. x = unknown.

Discussion

Austrostipa is a genus of 63 species, all of which are native to Australasia. Two species are cultivated in the Flora region.

Key

1 Plants shrubby; panicle branches and pedicels plumose, hairs 1.5 mm or longer Austrostipa elegantissima
1 Plants bamboolike; panicle branches and pedicels not plumose, if hairy then the hairs to 0.3 mm long Austrostipa ramosissima

"decumbent" is not a number."prolonged" is not a number.

... more about "Austrostipa"
membranous +  and scarious +
penicillate +
pilose +  and glabrous +
mucronate +, muticous +, acuminate +  and acute +
Surrey W.L. Jacobs +
S.W.L. Jacobs & J. Everett +
twisted +  and not branched +
1 (?) +  and 3 (?) +
subterminal +  and eccentric +
2 times-geniculate +
0.3 cm3 mm <br />0.003 m <br /> (30 cm300 mm <br />0.3 m <br />) +
keeled +  and rounded +
pseudopetiolate +  and branching +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
narrower +
not evident +
cross +, linear +  and narrowly lanceolate +
spikelike +
well-developed +
persistent +
ascending +  and erect +
extravaginal +  and basal +
geniculate +
not woody +
0 +  and 1/3 +
liquid +, soft +  and hard +
capillary +
pistillate +  and staminate +
sometimes longer +
compressed +  and terete +
1-5(7)-veined +
1-10-veined +
usually longer +
subtending +
membranous +
uncinate +
0 cm0 mm <br />0 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
solid +  and hollow +
basally concentrated +  and evenly distributed +
3-5(7)-veined +
ovate +, rectangular +  and lanceolate +
subequal +
indurate +  and coriaceous +
membranous +
0 (?) +  and 2 (?) +
minute +  and small +
membranous +
inconspicuous +
lanceolate +
fleshy +  and membranous +
concealed +  and prominent +
2 +  and 1 +
well-developed +
reduced +
hairy +, scabrous +  and smooth +
dry +  and fleshy +
not prolonged +
disarticulating +
jacobs1996a +
1 +  and 60 +
unisexual +  and bisexual +
laterally compressed +  and terete +
1 +  and 3 +
simple +  and compound +
2 (?) +  and 3 (?) +
Gramineae +
Austrostipa +
Poaceae tribe Stipeae +
membranous +
inconspicuous +
plant +  and shrublike +
aquatic +  and terrestrial +
12 +, 11 +, 10 +, 8 +  and 7 +