74 A FLORA OF MANILA 
4. Spikelets on the spike-like branches of a simple panicle. (Tribe 
FESTUCEAE. ) 
5. Flowering glumes 1- to 3-nerved.........20.2....2.-:-200--0-+ 34. Diplachne 
5. Flowering glumes several-nerved...............-.:--00+0--- 35. Centotheca 
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 
5. Slender grasses; rachilla glabrous or merely pubescent; glumes 
S-MOP ROG gs ysiendiatachinne- btn increas na ede a 37. Eragrostis 
4. Spikelets in 2 rows on one side of the digitately or racemosely 
arranged spikes. (Tribe CHLORIDEAE.) 
5. Spikes digitate or approximate. 
G. Spikelets. 1-Howered ....32--<s.20----nc:ncndode scree 38. Cynodon 
6. Spikelets 2- or more flowered, the upper flowers imperfect, 
the flowering glume awned................:2::--:0-200---0000e" 39. Chloris 
6. Spikelets with from 3 to 6 perfect flowers. 
7. Spike with terminal spikelets.....................-------.--- 40. Eleusine 
7. Spikes with the rachis extended beyond the upper spikelets 
in a martitfest pointes oo nce 41. Dactyloctenium 
5. Spikes racemosely arranged along the elongated rachis, filiform; 
spikelets very small, alternate, several-flowered. 
42. Leptochloa 
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. Bambusa 
3. Spikelets in dense globose or cylindric clusters along the branches, 
1s, rarely. .2-HOweted,:..-35 565 ee eee 44, Schizostachyum 
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 min length. (FI. Filip. pl. 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 genus and species, Euchlaena luxurians 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. 
