722 |  GRAMINEZ HIEROCHLOE 
COLEANTHUS 
8 HIEROCHLOE Gmelin FI. Sib. i, 101. 
Panicle loose and spreading. Spikelets laterally compressed, 
3-flowered, the 2 lower or lateral ones staminate, the upper or 
central one perfect. Glumes 5, the first and second about equal, 
acute, glabrous; the third and fourth somewhat shorter, obtuse, 
entire, emarginate, 2-toothed or 2-lobed with or without an awn, 
enclosing a palet and stamens; the fifth often produced into a 
short awn, enclosing a palet and perfect flower. Stamens 3 in 
the staminate flowers, 2 in the perfect one. Styles distinct. Stig- 
mas plumose. Grain free, enclosed by the glume. 
H. macrophylla Thurber: Bolander in Trans. Cal. Agr. Soc. 1864-65, 
132. Stems 1-3 feet high forming large loose tufts, with leaves 12-18 inches 
long by 4-10 lines wide, rough on the upper surface and margins: panicle 
with rather distant branches in pairs: glumes greenish along the very distinct 
nerves, obtuse and barely equalling the staminate flowers, the lower palets 
of which are stronghly fringed on the margins, notched at the apex and often 
with a slight mucro or awn: perfect flower pubescent toward the apex, other- 
wise smooth and shining: the flowering glume very obtuse and fringed on the 
margins. In forests, western Washington to California. 
H. borealis R. & S. Syst. ii, 513. Stems 1-2 feet high, erect simple, 
smooth: lower leaves elongated, 4-8 inches long, 1-3 lines wide, scabrous, 
the upper ones 44-2 inches long: panicle 2-4 inches long, its branches 1-2 
inches long, usually spreading, naked below: spikelets yellowish-brown and 
purple, 2-3 lines long: lower glumes glabrous; flowering glumes villous and 
strongly ciliate, entire, awn-pointed: palets villous at the apex. Along 
streams, Oregon to Alaska and the northern Atlantic States. 
Tribe V Agrostidex. Spikelets all hermaphrodite, one-flowered, 
with one pair of empty glumes, or these rarely wanting, usually as 
long as or exceeding the flowering glumes. Rachella sometimes pro- 
longed behind the palet into a naked or plumose bristle. 
9 COLEANTHUS Seidel Reichenb. Incon. Fl. Germ. i, 177. 
Panicles simple or branched, the flowers in umbellate clusters 
of short 1-flowered rays. Empty glumes wanting: flowering 
glume membranous, l-neryed, acuminately awned. Palet shorter 
than the glume, with 2 divergent nerves, keeled, bifid at the apex, 
the divisions acuminate: scales none. Stamens 2, with oblong 
- anthers. Ovary sessile, smooth. Stigmas sessile, denticulate 
with subulate hairs. Grain oblong, somewhat longer than the 
glumes which are persistent and surround its base. 
C. subtilis Seidel 1. c. Stems slender, 1-3 inches long, forming loose 
tufts 1-4 inches in diameter, decumbent and geniculate below, often branch- 
ed, from an annual root: leaves about 6 lines long, curved, smooth: ligule 
elongated, acute; sheaths al] inflated: panicle 6-18 lines long, its base includ- 
ed in the upper sheath, mostly simple, with 3-4 umbellate clusters, sometimes 
with one or two short. branches with an umbel at the end of each: pedicels 
longer than the spikelets, scabrous, glumes-roughened on the keel. On low 
muddy flats along the Columbia river; also in northern Europe. 
10 SPOROBOLUS R. Br. Prodr, Fl! Hol. i, 169. 
Panicle open and pyramidal to narrow and spike-like. Spike- 
