174 CYPERACEAE 
bases: heads about 1 em. in diameter: spike- 
lets elli pte, 5-7 mm. long, pale, often green- 
Mas cales 3—4 mm. long, o obtuse or 
mueronulate: achene esl Ai oid or 
bro DO oval, fuly 1 ong, finely 
wrinkled. = pina bu Keys, Fla. 
2. D. colorata (L.) A. Hitehe. Plant up to 
m. tal 
dp us leaf-blades narrowly jun deus 
i , white or 
braets of 
yellowish oe at the n refexed when 
matur eads 1.5-2 cm. meter or 
rarely 5 smaller Dr Meis elliptie: 
Sca m. long, whitish: m obovoid 
Or me cw fully 1 long, not 
constricted at the base, the tubercle case 
on the top of the e.— ( )—Wet places, low grounds, and swamps, 
usually calcareous, C4 a ad occasionally adj. provinces, Fla. to Tex. 
and Va. (or N. J.?9) —(W. I., Mex.) 
3. D. latifolia Baldw. Plant up to 1.2 m. tall, _the 2 E) Budd leaf- 
blades broadly linear-attenuate: braets of the involuere 7—10, becoming c p 
or ed, often reddish at the end strongly reflexed Mn mature: me 1.5-2 e 
n diam 
mm. lon Shitish: 
iene E -obovoid or turgid-globose, fully 1 mm. long, often constricted 
at the base, the tuber a decurrent on the sides of the achene.—(WHITE-TOP 
RUSH.) Moist or wet pinelands, Shallow d and aeid sandy swamps, Coastal 
Plain and rarely adj. provinces, Fla. to Tex. and Va. 
15. PSILOCARYA Torr. Annual, or rarely perennial, caulescent herbs. 
Leaves fe blades very narrow and elongate. Spikelets few to many, in 
terminal Bd Mec umbel-like or cyme-like clusters, not flattened, several- 
many-flowered. Scales closely imbricate, concave, deciduous.  Perianth-bristles 
wanting. ens 2 or Mus . Ovary sessile: style with a dilat 
e base. Stigmas 2. Achene lenticular, short, sometimes d 
re or less ads n transversely wrinkled, capped by the short or ur 
RR —About 10 species, natives of the warmer parts of Ameri 
um.—fall, or all year S.—BALD-RUSHES. 
Tubercle oe to triangular-lanceolate or subulate, nearly or quite as long as the 
ne, slightly decurrent. 
An. finely and shallowly, often obscurely, wrinkled, the 
tubercle subulate. 1. P. scirpoides. 
Achene haa wrinkled, the tubercle ovate to triangular- 
lanceolat 2. P. corymbifera. 
Tubercle dius much shorter than the achene, more or less 
nd aud at the base 
Achene about 1 mm. long, slightly, often obscurely, shouldered 
at the base: spikelet- o 2-3 mm. long. 3. P. nitens. 
Achene about 1.5 mm. , prominently shouldered at the 
base: spikelet-scales d 3. 5 mm. long. 4. P. Schiedeana. 
P. scirpoides Torr. Plant 0.5-3 dm. tall, or rarely smaller or ide er: 
spikelets ovoid, usually ous. so, 5-7 mm. long, obtuse or acute: scales 
2.5-3 mm. long, obtuse or acute, appressed, chestnut-brown: achene sub- 
orbicular in outline, or Pl n barely 1 mm. long, finely E shallowly 
