GARDEN BOTANY. 



bcxxvii 



OKDER GRAMINEJD. GRASS FAMILY. 



Manual, p. 535. The cultivated meadow Grasses are all described in the 

 Manual. The following very simple key leads up to them, and also to the few 

 ornamental Grasses, and the cereal grains, &c. 



Flowers of two very distinct sorts and sexes ; the staminate in a 

 terminal cluster of spike-like racemes ; the pistillate in 

 2 or 3 great axillary spikes covered with husks, from 

 the lower part of the same stem, ' . . 



Flowers of two kinds, one staminate, the other pistillate, on differ- 

 ent plants, La a very large compound panicle, the pis- 

 tillate flowers (only cultivated) beset with long white 



silky hairs. . . , t? _, 



Flowers hi only one kind of inflorescence, viz. : 

 In two or more one-sided spikes at the top of the culm. 

 Spikelets several-flowered, densely crowded in the spike, 

 Awn-pointed and very much flattened. . . Man. p. 554. 

 Awnless and blunt. . . .V .^..-^ . Man. p. 554. 



Spikelets with only one perfect flower. 



Glumes nearly equal : a creeping perennial. Man. p. 554. 

 Glumes very unequal, the lower minute : annual. Man p. 577. 

 In many racemed or panicled spikes, awned or more or less 

 pointed, . . Man. p. 580. Echinochloa, $ of 

 In a single terminal spike or contracted panicle looking like a spike. 

 Spikelets or flowers on all sides of the jointless axis or rhachis, 

 in clusters on very short side-branches, so that it is not 

 a simple spike : only one perfect flower to a spikelet. 

 Awns rough, springing from the short pedicels. Man. p. 581. 

 Awns short, one terminating each glume. Man. p. 541. 



Awn low down on the back of the single palea. Man. p. 540. 

 Awns none : glumes winged : an abortive flower each side of 

 the base of the perfect one. . . Man. p. 574. 

 Spikelets borne directly on the rhachis, at the joints, alter- 

 nately on opposite sides, each spikelet 



Several-flowered, edgewise : only one glume. Man. p. 569. 

 Several-flowered, flatwise, with a pair of glumes. 

 Two-flowered, only one spikelet at each joint of the rhachis, 



nearly as in the last, long -awned. .:,. , 

 Two - three-flowered, two or three Spikelets on each joint of 

 the rhachis, awned, . . Man p. 579. 



One perfect flower only to each spikelet, long-awned. . . 5. 

 In a panicle. 

 Spikelets strictly 1-flowered and with only two paleae, i. e. no 



empty paleae or rudiments of a second flower. 

 Paleae indurated, much flattened laterally : stamens 6. 6. 



Paleae indurated, rolled up in a cylinder : one long awn. 7. 



Paleae thin and delicate, smaller than the glumes. Man. p. 543. 

 Spikelets i-flowered, and with a single palea or a pair of empty 

 paleae between the perfect flower and the lower glume. 

 Paleae of the perfect flower chartaceous or coriaceous. Man. p. 576. 

 Paleae all delicate ; glumes coriaceous. . . . . 8. 



Spikelets with a short rudiment, or abortive pedicel, at each side 

 of the base of the chartaceous perfect flower. Man. p. 574. 



1. ZEA. 



2. GYNERIUM. 



DACTYLOCTENIUM 

 ELEUSINK 



CYNODON. 

 DIGITARIA. 



PANICUM. 



SETARIA. 

 PHLEUM. 

 ALOPECURUS. 



PHALARIS. 



3. 



LOLIUM. 

 TRITICUM. 



4. SECALE. 



ELYMUS. 

 HORDEUM. 



ORYZA. 

 STIPA. 

 AGROSTTS. 



PANICUM. 

 SORGHUM. 



PHALARIS. 



