A text-book of grasses with especial reference to the economic species of the United States . Fig. 28. Stenotaphrum portion of culms with inflores-cence, X H. spikelet, X5. CHAPTER XVIII Tribe VI. ORYZE^ This is one of the smaller tribes, theplace of which amongthe other tribes isnot evident. Neitheris it in itself a naturalgroup, but is madeup of genera of diverseaffinities. Certainanomalous genera,such as Pharus () Streptochaeta andReynaudia, includedby Hackel and byBaillon in Oryzese arereferred by Benthamand Hooker, the firsttwo to Panicese andthe third to Triste-gin
A text-book of grasses with especial reference to the economic species of the United States . Fig. 28. Stenotaphrum portion of culms with inflores-cence, X H. spikelet, X5. CHAPTER XVIII Tribe VI. ORYZE^ This is one of the smaller tribes, theplace of which amongthe other tribes isnot evident. Neitheris it in itself a naturalgroup, but is madeup of genera of diverseaffinities. Certainanomalous genera,such as Pharus () Streptochaeta andReynaudia, includedby Hackel and byBaillon in Oryzese arereferred by Benthamand Hooker, the firsttwo to Panicese andthe third to Triste-gineae. The articula-tion of the spikeletsbelow the glumes in-dicates an alliancewith the first seriesof tribes, Panicoideae;the laterally com- T\T-QooQrl rw +QTc.+ o Fig. 29. Phania glaber. Plant reduced; branch-preSSeu or X e r e l e let of inflorescence with a sessile pistillate and pedi-ed staminate spikelet, and a fertile flor(S. Dept. Agr., Div. Agrost., BuU. 20). (189). spikelets indicate an veiled staminate spi_kelet, and a fertile floret. XS. 190 A TEXT-BOOK OF GRASSES alliance with the second series, Poseoidese. The spikeletsare l-flowered, perfect or unisexual, and usually disposedin panicles. There are usually 6 stamens and the hilumis linear instead of punctiform, in which two respectsthe structure is somewhat anomalous. The palea isusually described as 1-nerved, but an examination ofOryza saliva shows a palea with the 2 nerves close tothe margin, the region between convex instead of concaveas is usual in the palea of other grasses. In several genera,glumes are rudimentary or wanting. The tribe includesabout 16 genera, mostly inhabitants of tropical America,6 extending into the United States. Key to the Genera of Oryze^ A. Spikelets perfect, strongly compressed laterally. B. Glumes 2; lemma often awned ORYZA() BB. Glumes wanting; lemma awnless Homalocen- AA. Spikelets unisexual, terete; plants monoecious. chrus. B. Plants slender, creepi
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Keywords: ., bookauthorhi, bookcentury1900, bookdecade1910, booksubjectgrasses
