a. 
з 
m 
51 
Style thread-like, longer than the corolla. 
False Gromwell. (Onosmodium virginianum.) 
. Style not completely as in a. 
Common Gromwell. (Lithospermum officinalis.) 
FLOWERS GREENISH OR ELSE WITHOUT A DISTINCT PERIANTH. 
72 a. Flowers green or greenish, or without a distinct perianth............ „а. 
КИЕ nob ЕШ ое нее Ene н ln ad hok не куа 116. 
13 a. Leaves grass-like, linear, usually } in. or less broad, 1 іп. or more long.. .74. 
b. Leaves not completely as in d... uos Horno hem ее кън 82 
Уд в. Flowers іл spikes... аа неа на аз sa kie онаа e Rip 75. 
b. Flowers in terminal panicles or umbels................. eene 29, 
15 a. Spikes about 1 in. long, solitary at the end of the flowering stalk. 
Spike Rush. (Eleocharis tenuis.) 
b. Spikes not completely-as ій д....................1..............- 76 
76 а. т 1-3 in. long, somewhat flattened, the spikelets € leaves fragrant 
en drying....... Sweet Vernal Grass. (Anthoxanthum odoratum.) 
b. "е notcompletelv. as id ici. ood аА эры ( Carex.) 
77 а. Leaves hairy; flowers in има E umbels. 
Wood Rush. (Juncoides campestre.) 
b. Leaves not Бану... ves еен eai b e жа eR ee eee ai 78 
18 a. Flowers in top-shaped heads arranged in terminal umb 
Rus Tis uncus acuminatus.) 
b. Flowers not in top-shaped heads, ирон! in panicles esie nete ens 79 
79 a. Spikelets with hair-like awn: out $ in. long. 
gps room-grass. (Bromus tectorum.) 
b. Spikelets of panicle not completely as in а.......................... 80. 
с 
о 
& 
x 
dta 
b. 
84 a. 
b. 
85 a. 
b. 
. Outer scale of spikelets shining; grass fragran 
H 
oly poi (Savastana odorata.) 
81. 
. Outer scales of spikelet not shining; grasses not fragrant............-. 
. Spikelet 1-flowered, comparatively broad, blunt at apex 
Mountain 
+ 
Rice. (Oryzopsis as asperifolia.) 
Spikelet 2-6-flowered, tapering to apex; grass common 1 in 
ear-grass. pred annua.) 
Spe: 
. Flowers arranged compactly on a spike-like spadix which is surrounded or 
8 
ended ide a leaf-like bract or t spetbe bz c pete Ее 3. 
Skunk Cabbage. dSpallgema dide ) 
Plants not with a disagreeable odor.............. eee eee 
Leaves compound, with 3 leaflets; plant common in Mood 
Jack-in-the-Pulpit. (Arisaema triphyllum.) 
Leavesahnple. eii. аиан EE) Mee Se es se rendir Rei 85. 
Leaves arrow-shaped; leaf-like spathe green, surrounding the flow 
Arrow Arum. (Peliandra ад 
Leaves ovate; leaf-like spathe white, subtending the flowers 
Water Arum. (Calla palustris.) 
