. Gray's new manual of botany. A handbook of the flowering plants and ferns of the central and northeastern United States and adjacent Canada. Botany. 309. H. micrantha. Plant X %. Spikelet x 2%. Acliene x 10. 12. HEMICARPHA Nees & Am. Spikelet, flowers, etc., as in Scirpus, except that there is a minute translucent scale (readily overlooked) between the flower and the axis of the spikelet. Sta- men only 1. Style 2-cleft. Bristles or other perianth none. (Name from i]fu-, half, and Kdp(fios, straw or chaff, in allusion to the single inner soalelet.) 1. H. micrintha (Vahl) Britton. Dwarf or
. Gray's new manual of botany. A handbook of the flowering plants and ferns of the central and northeastern United States and adjacent Canada. Botany. 309. H. micrantha. Plant X %. Spikelet x 2%. Acliene x 10. 12. HEMICARPHA Nees & Am. Spikelet, flowers, etc., as in Scirpus, except that there is a minute translucent scale (readily overlooked) between the flower and the axis of the spikelet. Sta- men only 1. Style 2-cleft. Bristles or other perianth none. (Name from i]fu-, half, and Kdp(fios, straw or chaff, in allusion to the single inner soalelet.) 1. H. micrintha (Vahl) Britton. Dwarf or minute annual ( dm. high); involucre 1-leaved, as if a continuation of the bristle-like culm, and usually with another minute leaf; spikelets,l-ii, short-cylindric or ovoid (2-4 mm. long) ; scales oblong or narrowly obovate, brown, tipped with a short recurved point; achenes cylindric, brown, slightly reticulated, with many close rows of crowded low papillae. {H. sub- squarrosa Nees.) — Sandy borders of ponds and rivers, N. H. to Fla., w. to the Pacific ; chiefly on the coastal plain and in the flat country of the interior. (Mex., S. A.) Fig. 309. 2. H. Drummfindi Nees. Similar; scales broadly obovate or rhombic, the broad green midrib barely projecting as a blunt oppressed tip ; achenes narrowly obovoid, ashy, scarcely reticu- lated, the papillae fewer and somewhat remote. — Damp sand, etc., w. Ont., Ind., and 111. to Ark., Kan., and Tex. July- Oct. Fig. 810. 3. H. occidentHlis Gray. Spikelets globose, the wide-spread- ing lanceolate or narrowly ovate scales tapering to slender re- 311. H. occidentaiis. curved atvns (as long as the blades) ; achenes as in the latter. Spilielets x 2%. — Damp sand, w. ; Wash, to Cal. July-Oct. Fig. 311. Achene xio. 810. H. Drummondi Spikelet x 2%. Achene x I' 13. LIPOCArPHA R. Br. Spikelets terete, many-flowered, in a terminal close cluster involucrate by leafy bracts. Scales spatulate, regularly im- bricated in ma
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