132 BOTANY. 
Plate III, Astreatus BeckWITHit. 
Fig. 1, vexillum; 2, a wing; 3, keel; 4, calyx and pistil; 4, stamens; 6, pistil, the ovary 
vertically divided. All enlarged. 
Plate [V..CENoTHERA TANACETIFOLIA. 
Fig. 1, vertical section of a flower; 2, stamens; 3, pollen;-4, ovules. All variously en- 
larged ; 
Plate V. TrTRADYMIA GLABRATA. r 
Fig. 1, a capitulum; 2, receptacle; 3, a flower; 4, corolla and stamens; 5, corolla and sta- 
mens laid open; 6, a stamen; 7, transverse section of the ovary; 8, pistil, with the ovary ver- 
tically divided; 9, stigmas; 10, a bristle of the pappus. The details variously enlarged. 
Plate VI. PENTSTEMON HETERANDUM. 
Fig. 1, a flower; 2, diagram of the estivation, &c.; 3.4, normal form for the genus of 
wstivation of the corolla; 5, vertical section of a flower ; 6, corolla laid open, with normal sta- 
mens; 7, 8, anterior and posterior view of a perfect stamen; 9, 10, 11, the fifth stamen more 
or less antheriferous; 12, the fifth stamen reduced to the usual sterile filament; 13, pistil. 
The details variously enlarged. 
Plate VII. PHaceLia HUMILIS. 
Fig. 1, a flower; 2, corolla laid open, with the stamens; 3, 4, stamens; 5, pistil and calyx; 
6, the same in fruit ; 7, capsule, &c., vertically divided; 8, a seed; 9, vertical section of the 
same. The details more or less magnified. 
Plate VIII. Putox canescens. 
Fig. 1, a flower; 2, the same laid open; 3, 4, stamens; 5, pistil; 6, ovary horizontally di- 
vided; 7, vertical section of the ovary. The details variously enlarged. 
Plate IX. Gra Gunnisont. 
Fig. l,a flower ; 2, calyx laid open; 3, corolla laid open; 4, pistil—pistil with the ovary 
vertically divided; 6, ovary transversely divided; 7, calyx and capsule. Details variously 
enlarged. 
Plate X. ABRONIA FRAGANS. 
Fig. 1, a flower; 2, the same laid open; 3, anther; 4, stigma; 5 » Immature fruit, 
