216 
Blades with a white-carti- 
laginous margin, not cili- 
ate; spikelets 1.5 mm. 
long 
Blades without white mar- 
gin, ciliate toward the 
cordate base; spikelets 
scarcely over 1 mm. long, 
suborbicular..........-.- 13, 
Plants not forming winter rosettes. 
Panicles narrow and compact with appressed branches; 
spikelets glabrous, 1 to 2.5 mm. long. 
Culms | meter or more tall, compressed at base; pan- 
icle 10 to 20 cm. long; spikelets 2.5 mm. long..... 9. 
Culms 60 cm. or less tall, stiff and wiry, base not com- 
pressed; panicle less than 5cm. long; spikelets 1 to 
2 mm. long. 
Spikelets scarcely more than 1 mm. long........ 40. 
Spikelets 2mm. long:................-.--..--- 43. 
Panicles open, usually diffusely spreading. 
Panicle branches in several distinct distant whorls; 
spikelets short-pediceled, remote along the 
branches.............---2-------------- ® 
Panicle branches not in distinct whorls. 
Spikelets 5 to 6 mm. long, pedicels short and 
stout; panicle branches few, ascending. ......- 
Spikelets less than 5 mm. long, pedicels slen- 
der, often capillary. 
Plants producing scaly rootstocks. 
Blades 5 to 15 cm. long; culms less 
than 50cm. tall; a sea-shore grass... .. 34. 
Blades elongated, 20 to 40 cm. long; 
culms | meteror more tall........... 47. 
Plants not producing rootstocks, but culms 
sometimes decumbent and rooting at base. 
Spikelets glutinous, 3 mm. long 
Spikelets not glutinous. (See contin- 
uation 2.) 
(Continuation 2.) 
Spikelets warty-rugose, about 2 mm. long; blades ovate- 
lanceolate ..........2.----0-2 22-2 e ee ee ee ee ee ee eee eee ee 38. 
Spikelets not rugose. 
Spikelets pubescent, minute (1 mm. long); blades ovate- 
Spikelets glabrous. 
Spikelets 1.5mm. long, short-pediceled on thespread- 
ing branches of a panicle 2 to 5 em. long; culms 
slender, 30 to 50 cm. high, blades | to 2 mm. wide. 
Spikelets on more or less elongated pedicels. 
Culms slender, widely decumbent-spreading; 
blades elliptic-lanceolate, 1 to 3 cm. long, 
glaucous..........2.....2220 202020222 e eee 30. 
i. F 
14. 
~ 
~ 
~ 
- 
a) 
Lee] 
P. 
P. 
P. 
P. 
CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
. tenue. 
erectifolium. 
condensum. 
stenodes. 
tenerum. 
. megiston. 
. 2izanioides. 
. repens. 
. virgatum cubense. 
. glutinosum. 
. sellovit. 
. trichoides. 
. exiguiflorum. 
parvyolium. 
4 
