1925) NAKAI, TWO NEW GENERA OF BAMBUSACEAE 149 



7. Indocalamus Wightianus Nakai, comb. nov. 



Arundinaria Wightiana Nees in Linnaea, ix. 4S2 (1834).— Ruprecht, Bamb. 26, 

 t. 3, fig. 10 (1839).— Steudel, Syn. Cram. 335 (1855).— Thwaites, Enum. 

 Zeyl. PI. 444 (1864).— Munro in Trans. Linn. Soe. xxvi. 19 (1868).— 

 Gamble, Bamb. Ind. 4, t. 2 (1896) ; in Hooker, Fl. Brit. Ind. vn. 377 (1897).— 

 Camus, Bamb. 28, t. 22, f. B (1913). 



India et Zeylania. 



Indocalamus Wightianus var. hispidus Nakai, comb. nov. 



Arundinaria hispida Steudel, Syn. Cram. 335 (1855). 



Arundinaria Wightiana var. (3 hispida Gamble, Bamb. Ind. 4 (1896); in 

 Hooker, Fl. Brit. Ind. vn. 377 (1897). 



Arundinaria moliniformis Hoehstetter in herb. Hohenacker n. 1282 apud 

 Gamble, 1. c. 



Ixdia. 



Widely different types were described hitherto under Arundinaria, so 

 that the genus became unreasonably large and complicated. The true 

 Arundinaria grows in North America and Asia. These are Arundinaria 

 macrosperma Michaux (type), A. tecta Muhlenberg, A. maling Gamble, 

 A. Wilsonii Rendle, A. Faberi Rendle. The latter three species have more 

 branched culms and may represent a distinct section. Arundinaria 

 hirsuta Munro and A. Rolloana Gamble are probably species of this genus 

 but without flowers we can not determine their exact position. These 

 species have the oral setae (setae orales, v. s.) rigid and scabrous some- 

 what brownish and radiating from a common thick process of the edge of 

 the sheath. They drop with that process from the sheath by articulation. 

 The species of Phyllostachys and Sasa have this kind of setae. The nature 

 of setae is an important generic character in classifying Baml>oos. It is 

 as important as the form of pappus in Composiiae. 



Mr. Makino who studied the Japanese Bamboos very carefully has 

 cleverly separated Pscudosasa, Chimonobambusa, Semiarundinaria and 

 Sinobanibusa from Arundinaria, though he has not given any descriptions, 

 but there are sufficient reasons for distinguishing these genera. The 

 group of Arundinaria has tessellate leaves as has the Phyllostachys group 

 and includes the following genera besides the two genera described above. 



1. Sasa Makino & Shibata 



Vaginae culmorum appendiculatae vel inappendiculatae, persistentes; 

 gemma soiitaria; setae orales scabrae rigidae vel rarius non evolutae. 

 Inflores( entia paniculata, glumae tessellatae, exteriores saepe aristato- 

 acuminatae; stamina 6; stylus 1; stigmata 3, subplumosa. 



1. Sasa bitchuensis Makino in Tokyo Bot. Mag. xxvui. 31 (1914). 



2. S. chartacea Makino & Shibata in Tokyo Bot. Mag. xv. 27 (1901). 



3. S. kurilensis Makino & Shibata, 1. c. 



4. S. nana Makino in Tokyo Bot. Mag. xxvi. 13 (1912). 



5. S. purpurascens Camus, Bamb. 19, t. 1, fig. B (1913). 



6. S. nipponica Makino & Shibata in Tokyo Bot. Mag. xv. 24 (1901). 



