l6. GRAMINEAE 89 



75. Spikelets i-flowered. Outer glumes 6 — -lo. Ovary glabrous. Style 



2 — 3-cleft or -parted. Tall shrubs. — Species 3. Madagascar and 



Mascarenes Nastus Juss. 



Spikelets 2- or more-flowered. Outer glumes i — 6 76 



76. Lodiculcs none. Spikelets 2-flowered, in clusters surrounded by two 



bracts. Ovary glabrous. Style undivided, hairy. — - Species i. German 



East Africa Oreobambus K. Schum. 



Lodicules 2-3. Spikelets without bracts. Ovary hairy .... 77 

 'J']. Lodicules 2. Outer glume i. Palea not winged on the keels. Styles 2, 

 free. Spikelets many-flowered. Herbs with 4 large leaves. - — Species 

 I. West Africa (Cameroons). (Under Giiaduella Franch.) 



Microbambus K. Schum. 

 Lodicules 3. Outer glumes usually 2 78 



78. Palea with winged keels. Spikelets strongly flattened. Herbs. — - Species 



5. Equatorial West Africa Guaduella Franch. 



Palea not winged on the keels. Spikelets shghtly flattened. Tall shrubs. — 

 Species 2. Cultivated and sometimes naturalized. They yield wood, 

 fibre, vegetables, edible seeds, drinks, and medicaments, and are also 

 used as ornamental plants. " Bamboo." .... Bambusa Schreb. 



79. (65.) Spikelets sessile in the notches on the rachis of a nearly always equal- 



sided spike, usually 2-ranked. [Tribe HORDEAE.] .... 80 



Spikelets along a rachis without notches, in usually one-sided spikes or in 



racemes or panicles. 94 



80. Spike one-sided. Spikelets solitary in each notch, i-flowered. Outer 



glume I, minute. Flowering glume awned. Stigma i. Leaves stiff. — • 

 Species i. Azores. " Matgrass." [Subtribe nardeae.] 



Nardus L. 

 Spike equal-sided. Stigmas 2 81 



81. Spikelets soHtary in each notch of the spike 82 



Spikelets 2 — ^6 in each notch of the spike. [Subtribe elyminae.] 93 



82. Spikelets with the back towards the hollows of the rachis. [Subtribe 



LOLIINAE.] 83 



Spikelets with the side towards the hollows of the rachis 88 



83. Spikelets i-flowered, awnless, the terminal one with 2 outer glumes, the 



others with one 84 



Spikelets 2- to many-flowered 86 



84. Flowering glumes with a hairy callus at their base. Outer glumes i — 3- 



nerved. Dwarf herbs. — Species 2. South and East Africa. 



Oropetium Trin. 

 Flowering glumes with a glabrous, sometimes rudimentary callus. . . 85 



85. Joints of the rachis of the spike produced into wing-like appendages. — 



Species i. Island of Socotra Ischnunis Balf. fil. 



Joints of the rachis of the spike without wing-hke appendages. — Species 3. 

 Madagascar, South and North-west Africa. . . Monerma Beauv. 



