stamens 6 or more, free or connate. 



X Caryopsis small, wheat-like, with a membranoiiB pericarp closely adnate to the seed, the style 

 caducous. 

 O Filaments free. 

 Bakbcsa. Inner palea boat-shaped and 2-carinate. Arboreous bamboos, rarely shrubby. 



O Filaments connate in a tube. 

 GiGAJJTOCHLOA. Inner palea boat-shapod and 2-carinate. Arboreous bamboos. 

 OxYTENANTHEEA. (Kurz, non Munro.) Inner palea compressedconcavo. Arboreous bamboos. 



X X Caryopsis often rather large, the pericarp separating already before full ripeness into an 

 outer firmly coriaceous or thick-fleshy wall (epicarp,) the inner cellular tissue in a dried 

 state more or less closely embracing the seed, the style* persistent or rarely caducous, 

 O Inner palea boat-shaped and 2-carinate, or more or less deplanate with a 2-keeled apex, 

 t Caryopsis rather small. 

 Dendbocalamtjs. Style collapsing in fruit. Caryopsis more or less terete. Inner palea boat-shaped, 2.carinate. 

 Cefhalostachyum. Style long, stiff and persistent. Caryopsis somewhat compressed. Inner palea more or less 

 deplanate or complicate on the back, or at least towards the apex 2-cariuate, 

 + f Caryopsis the size of a wood-apple and irregular globular. 

 rsEUDOSTACHyuM.-^Inner palea deplanate and boat-shaped. Large semi-scandent bamboos. ' 



Inner palea concave or convolute. 



4> Caryopsis very large, thick-fleshy, acuminate-beaked. 

 Mblocakna. Inner palea convolute. Stamens 6. Arboreous, rarely shrubby bamboos. 

 <) { Caryopsis rather small, dry and rigidly coriaceous, 

 t Stamens 6. 

 ScHlzosTACHTClt. Inner palea convolute, long. Caryopsis somewhat compressed, very long-beaked. Erect arboreous 



bamboos, rarely shrubby. 

 DiNoCBLOA, Inner palea concave, short. Caryopsis terete, ovate, acuminate. Climbing bamboos. 



"f f Stamens numerous (7-30.) 

 Beesha. Inner palea concave, twisted-convolute at the apex. Lodiculae 6-9. Caryopsis long-beaked. Arboreous 

 bamboos. 



ARUNDINARlAi Only species, A. elegam. 



BAMBUSA. ^ 



Stigmas white. 



X Shoot-sheaths not or ohscurely auricled at the mouth. 



Small bamboo; Leaves small, glabrous, whitish prui nous beneath, B. nana. 



X X Shoot-sheaths conspicuously auricled or the blade decurrent into an 

 auricle-shaped appendage. 



+ Auricles polished and smooth, without fringes. 



Mouth of leaf-sheaths long-produced, the ligule as much produced and as long as the 

 petiole, . affinis. 



+ + Auricles large, strongly /ringed. Unarmed bamboos. 



Shoot-sheaths green and striped, appressed bristles brown ; anthers purple or brown-purple, 

 angles of inner palea white-ciliate B. vulgaris. 



Shoot-sheaths white-powdered or almost pruinose, appressed bristles scanty, brown ; anthers 

 yellow ; angles of inner palea ciliate, B. Tulda. 



Shoot-sheaths green and yellow, appressed bristles white ; anthers purple ; angles of inner 



palea quite smooth, B. polymorpha. 



Stigmas purple. Spiny bamboos. 



Shoot-sheaths glossy-smooth, purple to scarlet ; leaves small ; angles of inner palea tomentose- 

 ciliate ; anthers yellow, B. arundinacea. 



GIGANTOCHLOA. 



X Spikelets white-hairy. Stigmas ichite. 



Shoot-sheaths almost 4 times shorter than the internodes, spreadingly tawny hispid, 

 ligule nearly | in. long, erose-toothed ; angles of inner palea white-pilose ; anthers 



yellow, G. albo-ciliata. 



X X Spikelets black or broicn hairy. 



Spikelets | 1 in. long ; shoot-sheaths densely appressed black-setose on the sides ; auricle 

 smooth and polished, nude G. Andamauica. 



* What Munro supposes to be the style is the conducting continuation of the inner cellular tissue which 

 always remains closely connate with the mouth of the beak. I have studied the developcment of the ovary of 

 Schizostachyum, Leleha and Bambusa, and I have lound that at a very eaily stage the structure of the ovary of 

 these genera is quite the same. The whole ovary cont-iats of minute oblong or elliptical closely packed and 

 uniform cells which form also the plumose stigmas. Long before the anthers become developed the outer somewhat 

 closer packed but not abruptly distinct wall indurates and the pollen-tubes have to pass for fecundation through the 

 looser cellular inner tissue. This inner cellular mass becomes drier and drier but remains attached to the outer 

 coat until the seed is perfectly ripe or the fruits are dried artiticially. Dendrocalamus and Pseudostachi/um luvm a 

 transition from the so-called berry-bearing to the true bamboos. Muuro's figures 7 (plate 4) and 5-ti (plate 3} ai-e 

 incorrect. 



