Flora of North America species comparison

to 150 cm tall, to 10 mm thick, erect, terete, solitary or in small clumps, succulent, glabrous, often with adventitious roots from the lower nodes, having an unpleasant, sulphurous odor when fresh.

to 250 cm tall, 2.5-11 mm thick, solitary or in small clumps, indurate.

mostly glabrous, throats sparsely pilose, lower sheaths sometimes somewhat wrinkled;

ligules 1-2 mm;

blades 8-12 mm wide, flat to loosely involute, glabrous, margins usually smooth, sometimes slightly scabrous, apices acuminate.

mostly glabrous, throats often pilose;

ligules 1-3 mm;

blades 20-96 cm long, 5-15 mm wide, flat when fresh, becoming involute when dry, glabrous on both surfaces, margins strongly scabrous, blade of the second leaf below the panicles 32-96 cm long, 5-14 mm wide, usually involute.

12-25 cm, with 3-25 branches, smoothly cylindrical, often partially enclosed in the uppermost sheath;

rachises twisted, glabrous;

branches 2-8 cm, usually closely appressed and twisted, lower branches noticeably longer and less closely imbricate than the upper branches, all branches with axes rarely extending past the distal spikelets, with 8-30 spikelets.

10-50 cm, not smooth in outline, with 5-50 branches;

branches 1.5-15 cm, appressed to somewhat spreading, with 10-80 spikelets.

8-25 mm, usually appressed, often appearing twisted, those on the lower branches usually less closely imbricate than those on the upper branches.

10-25 mm.

usually curved, sides and keels glabrous, scabrous, or hispid, apices acuminate to obtuse or rounded;

lower glumes 6-12 mm;

upper glumes 8-25 mm, 1-veined;

lemmas glabrous or sparsely appressed pubescent on the sides, keels glabrous, apices obtuse, rounded or lobed;

paleas slightly exceeding the lemmas, thin, papery, glabrous, apices usually rounded, rarely acuminate;

anthers 3-6 mm.

shortly awned, glabrous or sparsely hispidulous;

lower glumes 5-10 mm, from 3/4 as long as to equaling the adjacent lemmas, keels hispid, apices awned;

upper glumes 10-25 mm (including the awn), exceeding the florets, glabrous or sparsely hispid, keels scabrous to hispid, trichomes about 0.3 mm, lateral veins usually glabrous (rarely hispid), on either side of, and close to, the keels, apices awned, awns 3-8 mm;

lemmas glabrous, keels pectinate distally, apices bilobed, lobes 0.2-0.9 mm;

anthers 4-6 mm, well-filled, dehiscent.

= 60.

= 40, 40+1, 80.