86 BOTANICAL GAZETTE. 
culis 1-13 poll. longis. Spiculis orbiculari-ovatis, acutis, ramu- 
losum apice 3-6 aggregatis, bracteolis angustis brevioribus. Flos 
unica fertilis. Squamis castaneis margine angustissimo albidis ; 
inferioribus 2 parvis oblongis obtusis emarginatis vel acutls 
mucronatis ; reliquis magnis, concavis, mediis rotundo-obovatis — 
obtusis marginatis e sinu mucronatis (mucrone albo recurvato) ; 
superioribus ovatis acutis vel mucronulatis achenia paulo super- 
antibus. Achenium castaneum, obovatum biconvexum, circa 1 
lin. longum, transverse recte rugulosum, tuberculo depresso con- 
ico basi ovali soluto 3 longius. Setis 6 antrorsum denticulatis 
achenis 3-4 plo. brevioribus. fs 
Grand Prairie, E. Arkansas, 7. L. Harvey, 1883. 
Glaucous. Stem 13-2 feet high, slender, triangular, smooth, 
several leaved at base. Leaves 1 line broad, 6-10 inches long, 
tapering to a rough point; stem. leaves two, the upper at the 
middle of the stem. Sheaths 1 inch long. Bracts green, narrow, 
longer than the corymbs. Corymbs 2-3, remote; the uppermost 
the largest, compound, 2-3 short branched, branches 4 ine 
long or less; the others nearly simple, peduncled. Peduneles 
1-13 in. long. Spikelets orbicular-ovate, acute, aggregated 3-6 
together at the top of the branchlets, shorter than their narrow 
bractlets. Only one fertile flower. Scales chestnut, with a very 
AREX STRAMINEA, Schk., var. INVISA, var. n. Czespitos® 
multiculmis. Culmis gracilibus, angulis acutis scabris, infra me 
dium foliatis. Foliislonge vaginatis, ineam latis,sursum attenuato” 
sculmislongioribus vel brevioribus. Bracteis e basi lan- 
renlata ; lhide Lic “1 
Rac tewtahertit ibus, 1-6 poll. longis/inferioribus 1-2 | 
vel subobovoidea erecta sec 
spiculis 3-12 congestis, 
spicis 1-3, inferioribus eee 
gerentibus. Pedunculis 1-12 poll. longis leviusculis. Spiculis 
ernua vel apice pendula,3~5 poll. longi 
contiguis vel alternatis subdistantibus ; 
