Arthraxon GRAMINEAE Hackelocldoa 



Annual: spikelets solitary through the suppression of the pedicelled 



ones: stamens 2 2. A. hispidus 



1. Arthraxon lanceolatus (Roxb.) Hochst. #|/j (Yu Chu; Weed Bamboo) (H.F.7: 143). 

 Culms 30-90 cm. high; fls. VII; fr. VIII; perennial. India to eastern Asia and 

 Abyssinia; locally in An., Ku. Open slopes or sandy moist ground. 



2. Arthraxon hispidus (Thunb.) Mak. (Hitch.748). Culms 20-60 cm. high; fls. and 

 fr. V-X; annual. Tropical and temperate parts of the Old World; locally in An., 

 Ki., Ku. Open moist ground, shaded. Fig. 449. 



79. Phacelurus Griseb. fl^l^rjl (Chii Wei Ts'ao Shu) 

 Perennials with rigid glabrous corymbose digitate rarely solitary racemes: spikelets 

 binate, awnless, all alike or the pedicelled ones rarely laterally compressed; rachis 

 joints and pedicels stout, triquetrous. 4 species, in Asia and Africa; one in China. 

 (Greek: phakelos, a fascicle, and oiira, tail, alluding to the fascicled racemes.) 



1. Phacelurus latifolius (Steud.) Ohwi (Rottboellia latifolia Steud.; Manisuris latifolia 

 (Steud.) Kuntze) (Mak.F. 827). Culms up to 1 m. or more; fls. and fr. VI-IX. 

 China, Korea, Japan and southward to Java; locally in Che., Ku. Beaches and 

 river banks, 

 la. Phacelurus latifolius var. angustifolius (Debeaux) Keng. Differs from the species 

 in having solitary or 2-4 racemes and narrower blades, 2-5 mm. wide. Locally 

 in Che., Ku. 



80. Hemarthria R. Br. W^-M (Chien Ts'ao Shu; Economical-grass Genus) 

 Perennials with somewhat compressed solitary racemes: spikelets binate, awnless; 

 one sessile and perfect, the other pedicelled and staminate or perfect; sessile spikelets 

 sunken in the excavations of the somewhat tenacious rachis formed by the union of 

 the joints and pedicels. About 8 species, throughout the warm regions of the Old 

 World; 2 in China. (Greek: hemi, half, and arthron, joint, alluding to the jointed 

 but tenacious rachis.) 



1. Hemarthria altissima (Poir.) Stapf & C.E. Hubb. {Rottboellia compressa Linn. 

 f.var. fasciculata (Lam.) Hack.) (H.F. 7: 153; K.B. 1934: 109). Culms 60-90 cm. ; 

 fls. VII; fr. VIII. Temperate Eurasia and southern Africa; locally in An., Che., 

 Ku. Open moist ground. Fig. 450. 



81. Rottboellia Linn. f. MR^M (Lo Shih Ts'ao Shu; Rottboell's-grass Genus) 

 Annuals (ours) with stout terete solitary racemes: spikelets binate, awnless the 

 sessile perfect, sunken in the cavities of the thickened fragile rachis; the pedicelled 

 staminate or rudimentary, with pedicels free from or closely appressed to the joints. 

 About 15 species, chiefly pantropic; 3 in China. (After C. F. Rottboell, a Danish 

 botanist.) 



1. Rottboellia laevispica Keng (Wash. J. 21: 157). Culms about 1 m. high; fls. 

 VIII; fr. IX. Southeastern China; locally in Ku. Shady woods. 



82. Hackelochloa Ktze. 'MUMM (Ha K'e Ts'ao Shu) 

 Freely branching annuals with flat blades and numerous short solitary racemes; 



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