Y4 A FLORA OF MANILA 



4. Spikelets on the spike-like branches of a simple panicle; (Tribe 



5. Flowering glumes 1- to 3-nerved 34. Diplachne 11 



5. Flowering glumes several-nerved 35. Centotheca loo 



4. Spikelets in open compound panicles, the branches usually not 

 spike-like. 

 5. A very coarse grass; rachilla clothed with long white hairs. 



86.' Phragmites loo 

 5. Slender grasses; rachilla glabrous or merely pubescent; glumes ■ 



3-nerved '■ - 37. Eragrostis loo 



4. Spikelets in 2 rows on one side of the digitately or racemosely 

 arranged spikes. ( Tribe ChlorideAE. ) 

 5. Spikes digitate or approximate. 



6. Spikelets 1-flowered 38. Cynodon loj 



6. Spikelets 2- or more flowered, the upper flowers imperfect, 



the flowering glume awned - 39. Chloris loj 



6. Spikelets with from 3 to 6 perfect flowers. 



7. Spike with terminal spikelets 40. Elen!<wi> 103 



7. Spikes with the rachis extended beyond the upper spikelets 



in a manifest point 41. Dactylocte^ium ion 



5. Spikes raceniosely arranged along the elongated rachis, filiform; 

 spikelets very small, alternate, several-flowered. 



42. Leptochha 101 

 2. Stems woody, plants usually tree-like; leaf -blade with a petiole-like 

 base which is jointed with the sheath. ( Tribe Bambuseae. ) 

 3. Spikelets scattered along the branches, usually more than 1-flowered. 



43. Bcmibusa loi 

 3. Spikelets in dense globose or cylindric clusters along the branches, 



1-, rarely 2-flowered 44. Schizostachyum lOi 



1. ZEA Linnaeus 



A tall, stout, unbranched, monoecious grass, the stems solid. Leaves 

 large, broad, flat. Male inflorescence of terminal, racemosely arranged 

 spikes, the spikelets in pairs, one sessile,^one pedicellate at each of the ^ 

 alternating teeth of the unjointed rachis, the glumes 4, first and second 

 empty, enclosing the very thin third and fourth ones. Female inflorescence 

 a solitary, axillary, stout, sheathed spike, the rachis thick, spongy, the 

 spikelets 1-flowered, sessile, densely crowded in many vertical series on the 

 thick, cylindric rachis. (A Greek name for some undetermined grain.) 



A genus of one or two exceedingly variable species, natives of tropical 

 America, represented here by the following introduced and extensively 

 cultivated species. 



*1. Z. MAYS L. Mais (Sp.) ; Corn, Indian Corn, Maize. 



A very coarse, erect, grass, usually about 2 m high, the leaves very large, 

 often 10 cm wide 'and up to 1 m in length. (Fl. Filip. pi. 279.) 



Commonly cultivated in and about Manila, and throughout; the Philip- 

 pines; introduced by the Spaniards at an early date, originating in tropical 

 America. Cultivated in all temperate and tropical countries. 



A closely allied genjis and species, Euchlaena luxuriana Schrad., generally 

 known as "teosinte," has been cultivated in Singalon, but seems no longer 

 to be grown here. It is a native of Mexico and is very similar to Zea mays 

 in habit and appearance, differing chiefly in its smaller female inflores- 

 cence, the spikelets and grains arranged in a single row. 



