314 



3. 



4. 



5.— DIGITARIA. 



Key to species. 



Spikes 1-4 inches long 

 Spikes 6-12 inches long 

 Rachis more or less flattened 

 Rachis filiform ... 

 Glume II S-nerved 

 Glume II 5-nerved 

 Leaves lanceolate 

 L eaves filiform ... 



1. barbata. 



3. 

 4. 



2. tenuispica. 



3. sanguinalis. 



4. longiflora. 



5. setifolia. 



1 . D. barbata, Willd. ; Paniciim barbatum, Kunth ; Benth Fl. Hongk 



410. In the Happy Valley, Hongkong ; Pakhoi. Fl. — 



2. D. tenuispica, Rendle in Hemsl. Enum. PI. China, iii. 326< 



Macao. Fl. . 



3. D. sang^uinalis. Scop. ; Panicum sanguinale, Linn. ; Benth. Fl, 



Hongk. 410. Victoria Peak and Aberdeen, Hongkong : 

 river bank near Chaochauf u ; Canton. Fl. April — September 



4. D. longiflora, Pers. ; Paspalum brevifolium, Fluegg. ; Benth 



1. c. 408. In the Botanic Gardens, and on the racecourse, 

 Hongkong ; Whampoa. Fl. . 



5. D. setifolia, Stapf in Dyer Fl. Cap. vii. 376. Hills on the 



south side of the island, Hongkong ; near Canton. Fl. May. 



6.— PANIOUM. 



Key to species. 



1. Panicle branches awned ... ... 1. patens. 



Panicle branches not awned .. ... 2. 



2. Panicle simple with sessile one-sided 



spike-like branches 3. 



Panicle compound or spike-like ... 7. 



3. Spikelets alternating in 2 rows ... 2. distachyum. 

 Spikelets crowded or clustered ... 4. 



4. Spikes nearly equi-distant, forming a 



long slender panicle ; spikelets ^ 



inch, awnless 3. colonum. 



Spikes crowded 5. 



5. Leaves ovate-lanceolate, broad and 



amplexicaul at base ... ... 6. 



Leaves Imear 4. Crus-galli. 



6. Leaves densely pubescent 5. villosum. 



Leaves nearly glabrous ... ... 6. prostratum, 



7. Panicle contracted into a cylindrical 



spike 7. indicum. 



Panicle compound, with slender branches 



more or less spreading 8. 



8. Spikelets clustered or in short spikes 



along the branches 8. nodosum. 



Spikelets distinct, all pedicellate, ^^"i 



inch long 9. 



