84 
TETRANDRIA, MONOGYNIA. 
ecerulea. 
rous, stipules very long bristled ; flowers axillary 
sessile solitary alternate ; seeds hirsute. — Mich^ 
and Fnrs/u 
Icon. Smith’s and Abbott’s Insects of Georg, t. 38. 
A very ordinary looking plant, growing every where abun- 
dantly in Maryland and Virginia, in arid wastes, and sandy 
roads, but extremely rare in this neighbourhood, and quite lo- 
cal. i have never found it near the city, except on the barren 
sandy grounds a short distance from the Woodlands, near the 
Darby-road. Even there it grows sparingly . Flowers small, 
white, with a rosaceous tinge. Annual. August and later. 
76. HOUSTONIA. X. Gen. pi. 161. (Ruhiace^.) 
Calix 4-toothed. Corolla 1 petalled, funnel- 
form, 4-clefU Capsule 2-celied ; many seed- 
ed. 
1. H. stem erect slender dichotomous ; radical leaves 
spathulate, those of the stem ob-lanceolate, oppo- 
site, peduncles one-flowered, long. — Willd. and 
Pursh. 
Icon. Bot. Mag. 370. Pluk. aim. t. 97. f. 9. 
Sky-Blue Houstonia^ Bluetts. Innocence. 
This beautiful little species, is one of our earliest blooming 
spring flowers, and is universally known. It is extremely com- 
mon by road sides, and in grassy fields and meadows ; fre- 
quently being in such profusion as to cover rods of ground . 
Pursh describes a blue and a white variety. The former only 
grows in this neighbourhood. Not so common in Jersey, as 
on the Pennsylvama side of the Delaware. Perennial. From 
early Spring till Autumn. 
77. MITCHELLA. X. Gen. pi. 174. (^RubiaceaJ 
Flowers by pairs upon the same germ, supe- 
rior. — Calix 4-toothed. Corolla funnel-form, 
tube cyiindric; limb 4 parted, spreading 
