58 MISSOURI BOTANICAL GARDEN. 
dorsal view of flowering glume with a portion of the awn; c, palea; d, 
stamens, 
Plate 30. 1, Sporobolus ciliatus Presl. Panama.—a, Spikelet; b, 
spikelet in fruit; c, pistil; d, fruit. 2, Sporobolus humilis Presl. Island 
of Luzone. — a, Entire spikelet; b, same, empty glumes removed; c, 
fruit. 38, Sporobolus repens Presl. Mexico. — Natural size.— a, Empty 
glumes; b, flowering glume and palea; c, pistil; d, anthers. 
Plate 31. Nowodworskya agrostoides Presl, — a, Spikelet; b, back of 
flowering glume. 
Plate 32. 1,2, Agrostis caespitosa Presl. Peru (?), — a, Empty 
glumes; b, flowering glume; c, rudiment. — The lower figure is drawn 
from a specimen collected on the Wilkes Exploring Expedition in Peru. 
The upper figure is drawn from Presl’s specimen. 8, Agrostis rigescens 
Presl. Peru (?).— a, Empty glumes; b, flowering glume and palea. — 
Habit drawings, natural size. 
Plate 33. Agrostis toluccensis HBK. High mountains of Peru.—a, 
Empty glumes; b, spikelet with the empty glumes removed. 
Plate 84, 1, Trichodium album Presl. Nootka Sound.—a, Empty 
glumes; b, floret, 2,3, Trichodium nanum Presl. Peru (?).— Natural 
size. — a, Spikelet; b, floret, —The lower figure is drawn from a speci- 
men of the same species collected on the Wilkes Exploring Expedition. 
Plate 35. 1, Deyeuxia densiflora Presl. From mountains of Peru. — 
a, Empty glumes; b, floret, empty glumes removed, showing palea; c, 
rudiment. 2, Deyeuxia ovata Presl. High mountains of Peru. — a, Empty 
glumes; b, spikelet, empty glumes removed; c, rudiment. 
Plate 36. Deyeuxia fuscata Presl. High mountains of Peru. —a, 
Empty glumes; b, spikelet, empty glumes removed; c, rudiment. 
Plate 87. Deschampsia calycina Presl. — a, Empty glumes; b, spikelet, 
empty glumes removed; c, palea and grain. 
Plate 88. Avena pilosa Presl. —a, Empty glumes; b, spikelet, empty 
glumes removed; c, floret; d, dorsal view of flowering glume; e, palea. 
Plate 39. Monopogon avenaceus Presl. —a, Spikelet; b, back of first 
glume of one flower; c, back of second glume of one flower; d, third 
glume and inclosed palea; e, flowering glume, front; f, flowering glume, 
back; g, flowering glume, inside, flattened out; h, palea, back; i, ovary 
and lodicules. 
Plate 40. 1, Cynodon arcuatus Presl. Island of Luzone. —a, Empty 
glumes; b, spikelet, empty glumes removed. 2, Cynodon tener Presl. 
Luzone. — a, Empty glumes; b, floret and rudiment. 
Plate 41. Chloris truncata R. Br.— a, Empty glumes; b, spikelet, 
with the empty glumes removed; c, palea. 
Plate 42. Campulosus planifolius Presl. Mexico, —a, Outer or empty 
glumes; b, spikelet, empty glumes removed, and floret expanded. 
Plate 43. 1, Diplachne brevifolia Presl. High mountains of Peru, —a, 
Empty glumes; b, spikelet, empty glumes removed. 2, Diplachne riges- 
cens Pres]. —a, Emply glumes; b, spikelet, empty glumes removed. 
Plate 44. 1, Hragrostis alba Presl. Monterey, Cal. Specimen in- 
eae, 
a sn Ss 
