TAB. II. 



Fig. 25. Briza. — a. Spikelet. h. Floret. 



Fig. 26. Dactylis. — a. Spikelet. h. Floret. 



Fig. 27. Cynosurus. — a. Spikelet, with the pectinated invo- 

 lucre, b. Floret. 



Fig. 28. Festuca. — a. Spikelet. b. Floret. 



Fig. 29. Bromus. — a. Spikelet. b. Floret. 



Fig. 30. AvENA a. Spikelet. b. Floret. 



Fig. 31. Arundo. — a. Spikelet. b. Floret. 



Fig. 32. Elymus. — a. Spikelet. b. Floret. f 



Fig. 33. HoRDEUM a. Three calyces, lateral, each with a 



single floret, b. One of the lateral florets, c. Central (per- 

 fect) one. 



Fig. 34. Triticum. — a. Two Spikelets. b. Floret. 



Fig. 35. Brachypodium. — a. Spikelet. b. Floret. 



Fig. 36. LoLiUM. — a. Spikelet with the single-valved calyx. 

 b. Floret. 



Fig, 37. RoTTBOLLiA. — a. Spikelet on the rachis, with the late- 

 ral valves, b. Floret. 



Fig. 38. Knappia — a. Flower, b. Corolla. 



Fig. 39. Spartxna. — a. Flower, b. Corolla, c. Pistil. 



Fig 40. Cynodon. — a. Portion of a spike, b. Flower. 



Fig. 41. Digitaria. — a. Calyx, b. Corolla. 



Fig. 42. Pistil of a grass with its hypogynous scales, b. Portion 

 of the stem of a grass with the Hgule upon the leaf, and 

 the sheath slit on one side, c — g. Examples of the inflo- 

 rescence of Grasses, c. Spiked panicle as in Anthoxantlmm. 

 d. Panicle as in Briza minor, e. Compound spike, the spike- 

 lets distichous, as in Lolium perenne. f. Compound spike, 

 the spikelets imbricated on all sides, as in Triticum crista- 

 tum. g. Spike unilateral, or with the flowers pointing one 

 way, as in Spartina stricta. 



