Gramineae 137 



5. SHIBATAEA Makino Okamezasa Zoku 



Small erect bamboo with elongate rhizomes; culm-nodes prominent; internodes with a groove on one side; culm-sheaths 

 thinly chartaceous, glabrous, deciduous, with a short aristate blade, without bristles; branches few, short, usually with 2 nodes, 

 with 1 leaf (rarely 2) at apex and membranaous linear scales near the base; leaf-blades broadly lanceolate, without sheaths, not 

 bristly at base; inflorescence a short spike, axillary on lower nodes of branches, with membranous bracts; spikelets 1-3 in the 

 axil of each bract, sessile, 2-flowered, glabrous, broadly lanceolate or oblong, with a prophyllum at base; glumes 2, membranous, 

 broadly lanceolate, unequal, 9- to 13-nerved, acute; rachilla glabrous; upper internodes elongate; upper florets reduced; lemmas 

 membranous, broadly lanceolate, about 11-veined, with obscure transverse veinlets, abrupdy acuminate; palea nearly as long 



as the lemma, with 2 keels and few slender nerves; stamens 3; style 1; stigmas 3. Two species, one in Japan, the other in 



China. 



1. Shibataea kumasaca (Zoll.) Makino. Bambusa prophylla of branches linear, thinly membranous, bifid, 



k^utnasaca Zoll.; Phyllostachys \iimasaca (Zoll.) Munro; P. 2-keeled, pubescent on die keels; spikelets 15-18 mm. long; 



ruscifolia Nichols.; S. ruscifolia (Sieb.) Makino — ■ — Oka- glumes about 4 and 8 mm. long respectively; lemmas 10-12 



MEZASA. Culms erect, 1-1.5 m. long, branches short; culm- mm. long; palea glabrous on the keel; anthers about 8 mm. 



sheaths glabrous; leaf-blades 6-10 cm. long, 15-25 mm. wide, long. Widely culuvated, reportedly spontaneous in west- 



loosely pilose beneath, abrupdy acuminate, acute at base; ern Japan, 

 sheaths at base of branches membranous, linear, 3-4 cm. long; 



6. ARUNDINARIA Mkhx. Medake Zoku 



Rhizomes short or elongate; culms small to medium-sized; culm-sheaths persistent; branches few (rarely 1 or 2) at each 

 node, profusely branched; leaf-blades narrowly lanceolate, without auricles, the oral brisdes slender, smooth, flexuous; in- 

 florescence racemose-fasciculate at nodes of branches and culms; spikelets often sessile, bracteate or ebracteate, without prophylla, 

 linear, slighdy flattened, rather many-flowered; glumes 2, sometimes 1, small, chartaceous, several-veined; lemmas chartaceous, 

 glabrous, rather large, several-nerved, with transverse veinlets between the nerves; palea as long as the lemma, 2-keeled; rachilla 



appressed-pubescent; stamens 3; ovary glabrous; style single; sdgmas 3. Scores of species have been described from Japan 



and China. The following hst represents a conservative evaluation of the most important species. 



lA. Rhizomes often very short; culms in scattered tufts; ligules always prominent; leaf -blades narrow, caudately long-acuminate. 

 2 A. Leaf -blades 4-6, 10-30 cm. long; oral bristles usually wanting; inflorescence usually axillary, not leafy at base. 



3A. Leaf-blades narrowly lanceolate, 15-30 cm. long, 1.5-2.5 cm. wide, rather coriaceous, with elevated veinlets 1. A. hindsii 



3B. Leaf-blades linear, 10-30 cm. long, 8-20 mm. wide, chartaceous, with only slighdy raised veinlets 2. A. graminea 



2B. Leaf-blades 5-10, 4-15 cm. long, 4-10 mm. wide; oral bristles always well developed; inflorescence terminal on leafy branchlets. 



Z. A. linearis 

 IB. Rhizomes typically elongate, creeping; culms solitary; ligules sometimes prominent; leaf-blades usually broader. 

 4A. Culm-nodes with prominent hairs; leaf-sheath glabrous or nearly so. 



5A. Leaf-blades pubescent beneath ^. A. pygmaea 



53. Leaf-blades glabrous or nearly so beneath. 



6A. Leaf -blades narrowly lanceolate, gradually tapering above; culms thick, the prominent nodes densely fringed with rctrorse hairs. 



5. A. kitisiana 

 6B. Leaf-blades lanceolate to narrowly so, acuminate. 



7A. Culms nearly simple 6. ^. pumila 



7B. Culms much branched 1 . A. argenteostriata 



4B. Culm-nodes glabrous or nearly so. 



8A. Leaf-sheath densely short-pilose Z. A. nagashima 



8B. Leaf-sheath glabrous to only sparsely short-pilose. 

 9A. Leaf -sheath retrorsely pilose between the nerves. 



lOA. Leaf- and culm-sheaths purplish, retrorsely pilose only near the margins while young; inflorescence purplish. 9. A. vaginata 



lOB. Leaf- and culm-sheaths green, retrorsely pilose while young \0. A. I'irens 



9B. Leaf-sheath not retrorsely pilose. 



11 A. Culms larger, 3-5 m. tall, 1-3 cm. in diameter; branches numerous at each node; leaves rigid, long-acuminate, drooping at 



apex \\. A. simonii 



IIB. Culms smaller, 1-2 m. tall, 2-10 mm. in diameter; branches 2-3(-5) or rarely solitary; leaves thinner, not drooping at 

 apex. 



12A. Leaf-blades long-acuminate 12. A. chino 



123. Leaf-blades abruptly acuminate ^. A. pygmaea 



1. Arundinaria hindsii Munro. Pleioblastus hindsii base; leaf-sheaths glabrous, usually without oral brisdes, the 



(Munro) Nakai; T hamnocalamus hindsii (Munro) E. G. ligules rather long; spikelets few together, in lateral fascicled 



Camus Kanzan-chiku. Rhizomes short; culms in tufts, racemes, 5-8 cm. long, more than 10-flowered; rachilla ap- 



3-5 m. long, 1-3 cm. in diameter, deep green; nodes not pressed-pilose; lemma 10-15 mm. long; palea with spreading 



prominent, glabrous; internodes elongate; culm-sheaths gla- hairs on the keels. May. Spontaneous in s. China, culti- 



brous; branches 3-5, erect, with densely disposed branchlets; vated in Japan. 



leaves 4-5, the blades coriaceous, narrowly lanceolate, glabrous, 2. Arundinaria graminea (Bean) Makino. Pleioblastus 



15-30 cm. long, 1.5-2.5 cm. wide, long-acuminate, cuneate at graminciis (Bean) Nakai; A. hindsii var. graminea Bean 



