76 



A SYNOPSIS OF THE VEGETABLE KINGDOM. 



C. Lodicules usually 3 : fl. 

 glume and palea fin- 

 ally very hard 



D. Fl. glume nairow ; 

 awn twisted, stout. 



persistent 22 Stipa. 



DD. Fl. glume broad ; awn 

 slender, falling 



aftei- anthesis i!3. Oryzopsis. 



cc. Lodicules 2 (anterior) : 

 awns slender, some- 

 times reduced to a 

 mere point : palea 

 simply membranace- 

 ous: spikelets small. 24. Muehlenbebgia. 



BB. Awnless 25. Miliu-m. 



AA. Flowering glume usually 

 hyaline or membranace- 

 ous at maturity, at least 

 more delicate than the 

 empty glumes: grain 

 loosely or not at all in- 

 closed 



B. Stigmas s u b-p 1 u m o s e 

 (their very short hairs 

 springing from all sides) 

 projecting from apex of 

 nearly closed glumes. . 26. Phleuu. 

 BB. stigmas distinctly plu- 

 mose (branchlets 2- 

 ranked) projecting from 

 the sides of the spike- 

 lets, rarely remaining 

 inclosed within them.. 

 c. ralea 1-nerved, with 



one keel: stamen 1...27. CiNNA. 

 cc. ":ilea 2-nerved. rarel.v 

 wanting: stamens 3. 

 D. The fl.-glume with a 

 delicate awn insert- 

 ed below the point 

 and many times 

 longer than the 



glume 28. Apeba. 



DD. The fl.-glume not as 



in D 



E. Callus, or prolonga- 

 tion of rachilla, 

 having a tuft of 

 hairs at least a 

 third as long as 



the fl.-glume 



F. Fl.g 1 u m e and 

 palea thin — 



membranaceous.29. Calamacbostis. 

 FF. F l.-g 1 u m e and 

 palea chartra- 

 ceous : panicle 



spike-like 30. Am.mophila. 



FFF. Fl.-g 1 u m e and 

 palea chartrace- 

 ous ; panicles 



expanded 31. f'ALA.MfiviLFA. 



EE. Callus naked or 

 with a few very 

 short hairs 32. Ageostis. 



9. O.IT TBIEE OB AVENE.E. 



A. Spikelets readily deciduous 



as a whole 33. HOLcns. 



AA. Spikelets with fruiting 

 glumes deciduous, but the 

 empt.v glumes not decidu- 

 ous 



B. No. of fls. in a spikelet 

 strictly 2 : rachilla not 



produced 34. Aiea. 



BB. No. of fls. in a spikelet 2- 

 00: rachilla produced 



beyond upper fl 



c. Grain free, unfurrowed.35, Deschampsta. 

 cc. Grain furrowed, usually 



adherent to glumes.. 36. Avena. 



10. Fescue Tribe ob Festhce^. 



i. Rachilla or fl.-glume (at 

 least of the fertile fl.) 

 with long hairs which en- 

 velop the latter. Tall 



reed-like grasses 



B. Plant dicecious. female 



spikelets hairy, male 

 spikelets naked 



C. Culms perennial ; Ivs. 



rather evenly distrib- 

 uted over the culm.. 37. Gyneeium. 

 CC. Culms biennial : ivs. 

 mainly crowded at the 



base 38. Coetadebia. 



BB. Plant hermaphrodite 



(very rarely dicecious), 



all the spikelets hairy.. 



c. Hairy on fl. -glumes, not 



on rachilla 39, Abdndo, 



cc. Hairy on rachilla, not 



on fl.-glumes 40. Phragmites. 



A. Rachilla and fl.-glume naked 

 or hairy ; hairs much 

 shorter than the glumes : 



stigmas plumose 



B. Spikelets of 2 forms, the 

 fertile 1-3-fld., sur- 

 rounded by the sterile, 

 consisting of many 



glumes 



C, Fertile spikelets 1-fld. : 

 sterile spikelet with 



obtuse glumes 41. Lamaeckia. 



cc. Fertile spikelets 2-3- 

 fld. : sterile spikelet 

 with awned or pointed 



glumes 42. C'TNOSURns. 



EB. Spikelets all alike 



c. Fl.-glumes 1-3-nerved, 

 all with hermaphro- 

 dite fls. or the upper- 

 most only with a 

 male fl., or empty. . . 



D. Panicle-branches spir- 



ally arranged 



E. The spikelets loose- 

 ly 2-4-fld 43. MOLINIA. 



EE. The spikelets dense- 

 ly many-fld 44. Eeagkostis. 



DD. P a n i c I e-b r a nches 

 (primary ones) 2- 

 ranked. usually 

 branched again at 



the base 



E. Second empty glume 

 much broader- and 

 somewhat longer 

 than the fl.- 

 glumes 45. Eatonia. 



EE. Second empty 

 glumes not broad- 

 er nor longer 

 than the fl.- 

 glumes 46. KCELERIA. 



cc. Fl.-g 1 u m e s 5-many- 

 nerved ; each contain- 

 ing an hermaphrodite 

 fl. or the upper with 

 only a male fl. or 



empty 



D. Empty glumes 3-6 at 

 the base of each 



spikelet 47. Uniola. 



DD. Empty glumes 2 



E. Plants strictly dioe- 

 cious : spikelets 

 almost sessile. ..48. DISTICHLIS. 

 EE. Plants hermaphro- 

 dite (rarely dioe- 

 cious and then 

 loosely panicu- 

 late) 



F. Base of fl.-glumes 



cordate 49. Briza. 



FF. Base of fl.-glumes 

 not cordate. . . 

 G. Spikelets close- 

 ly imbricate, 

 arranged in a 

 linear, dense, 



false spike. ..50. Demazeeia. 

 GG. S p i k e I e t s in 

 small fasci- 

 cles which 

 are united in- 

 to a glome- 

 rate or inter- 

 rupted pani- 

 cle 51. Dactylis. 



