CYPERACEAE 139 
onies dd sometimes flower several seasons 
in succession. Leaves usually rough, 
ose. 
2. A. gigantea (Walt.) Chapm. Stem a 
much as 10 m. tall and 7 em. thick at Bese: 
leaf-blades 20-50 cem. long: panicle of few 
simple unequal racemes: spikelets 3-5 cm. 
long, 5-15-flowered. . macrosperma | 
Michx. ]— (LARGE-CANE. GIANT-CANE.)—Al- 
luvial situations, Coastal Plain, Fla. to Tex 
Okla., Ky., and Va.—Stems arborescent, 
forming ““cane- -brakes. ^^ Plants flow at 
i ud and indefinite periods. The P re- 
mble bamboo. Stock browse on the young 
sc and seeds. Young shoots are used as 
a pot her Aa Stems of the large cane are 
sed for fishing- poles: mats, baskets, and a variety of other purposes. Leaves 
cele ERU ascending. 
Famity 29. CYPERACEAE — SEDGE FAMILY 
Grass-like or rush-like caulescent or seapose herbs, when perennial 
usually with scaly or tuber-bearing rootstocks. Stems or scapes (culms) 
t 
es. 
monoecious or dioecious, borne in spikelets, usually solitary in the axils of 
each scale (bract, glume), the spikelets solitary or variously clustered, the 
seales 2-ranked or spirally imbricate, sometimes partly changed into leaves. 
Perianth hypogynous, consisting of’ bristles or -a or a 
droecium of 1 ens, or ly of e. Gyno of 2 
rpels. Ovary l-eelled. Styles united. Stigmas 2 or r3 Ovules solitary, 
anatropous uit a lenticular or 3-angled e.—Abo gene d 
3,200 oS of wide geographic distribution, but of little economic im- 
portan 
Spikelets with perfect flowers, or some Toners with abortive androecium or gynoecium. 
Scales of the spikelet enclosing 1 or 2 bractlets. Tribe I. HEMICARPHEAE, 
Scales of the spikelet not enclosing bractlets. 
Spikelets many-flowered, sometimes few- ‘flowered, with 
“the lowest scale, or rarely several of the lower scales, 
ower 
Spikelets 1- or 2-flowered, or rarely several- flowered, 
with 2—several of the lower scales D III. RYNCHOSPOREAE. 
Spikelets w with monoecious or dioecious flower 
Pistillate flower subtended by a flat scale: aegis exposed. IV. SCLERIEAE. 
Pi pe m xs n and achene, enclosed in a utricle (peri- 
IL SCIRPEAE. 
V. CARICEAE. 
I. HEMICARP 
Flower enclosed in 2 bractlets, one of them npe the other 
^A posterior. 1. LIPOCARPHA 
Flower subtended by a single minute posterior bractlet. 2. HEMICARPHA. 
II. Scr 
Scales of the spikelets conduplicate, fien. keeled, -2-ranked, 
the spikelets mostly flattene 
Flowers with barbed perianth- ‘bristles, 
Flowers without perianth-bristles 
ene smooth: style-base Hot swolle 
a with 2-many perfect flowers :  achéne en- 
closed in a single scale 4. CYPERUS. 
, Spikelets with 1 perfect flower : achene enclosed in "^ 
a pair of scales 5 
_ 9. DULICHIUM. 
. KYLLINGA. 
ABILDGAARDIA. 
Achene warty: gtyle- -base swollen. 6. 
