l6. GRAMINEAE 83 



Outer glumes awnless, the first and second about hi' If the length of the 

 third and the flowering glume. Spikelets in clusters along the branches 

 of the panicle. —Species 2. West Africa and Mascanne Inlands. Used 

 as ornamental plants Thysanolaena Xees 



30. (26.) Flowers unisexual. Male and female spikelets in different inflores- 



cences, or male spikelets in the upper, female in the lower portion of the 



inflorescence. [Tribe MAYDEAE.l 31 



Flowers hermaphrodite or polygamous, rarely {Andropogon) unisexual, 

 but then male and female spikelets in the same inflorescence and arranged 

 in pairs, the male spikelets sometimes rudimentary ^^ 



31. Male spikelets in a terminal spike, the female at its base, enclosed singly or 



2—3 together by a hardened globose bract. Style not very long, 2- 

 cleft. — Species i (C. Lacryma Jobi L., Job's tears). North-west Africa, 

 Madagascar and neighbouring islands. Used medicinally and for 



making ornamental articles and rosaries Coix L. 



Male spikelets in spikes arranged in a terminal panicle, female in spikes or 

 spadices with membranous bracts or spathes. Style very long, un- 

 divided or shortly 2-cleft 32 



32. Female spikelets in fascicled spikes with a jointed rachis. Style 2-cleft. 



Fruit enclosed when ripe in a cartilagineous case. — Species i (£". 

 mexicana Schrad., Teosinte), cultivated as an ornamental or fodder- 

 plant Euchlaena Schrad. 



Female spikelets connate into a spadix with a thick, not jointed rachis. 

 Fruit projecting beyond the membranous glumes, rarely enclosed by 

 leathery glumes. — Species i [Z. Mays L., maize or Indian com). Culti- 

 vated for the grain or as a fodder- or ornamental plant. The seeds are 

 also used for the preparation of starch, oil, and spirituous drinks. The 

 leaves and spathes peld fibre Zea L. 



33. Spikelets in heads surrounded by 2 or 3 involucral bracts, containing a sin- 



gle hermaphrodite flower. Outer glumes 2, membranous, awnless, the 



lower one short. Flowering glume larger than the outer glumes, awnless. 



Stamens 2. — Species i. North Africa and Senegambia. Crypsis Ait, 



Spikelets in spikes, racemes, or panicles 34 



34. Spikelets arranged singly or in clusters of 3 — 6, vei y rarely )n pairs, 



along the continuous rachis of a spike or raceme Outer glumes 2. 



■Tribe ZOYSIEAE.] 35 



Spikelets arranged in pairs, one sessile, the other stalked,, more rarelv 

 singly or in clusters of 3 or more, along the more or less distinctly jointed 

 rachis of a spike or raceme or along the branches of a sometimes ver}- 

 narrow (spike-Uke) panicle. Outer glumes usually 3. [Tribe AN- 

 DROPOGONEAE.j 42 



35. Spikelets in clusters of 3 — 6, falling as a whole 36 



Spikelets sohtary along the rachis, rarely in pairs 2>^ 



