‘TETRANDRIA, MONOGYNIA. | $5 
. - 
form, 4-cleft. Capsule 2-celled, many-seeded, 
half superior, opening transversely. 
Flowers terminal, rarely axillary; stem dichotomous, 
mostly quadrangular. | oe 
_Svecies. 1. H. patens, Ex. (pysilla.) The smallest” 
and earliest flowering species of the genus. Leaves pe- 
tiolate, ovate, acute, margin and angles of the stem a 
little scabrous; segments of the corolla short, rounded, 
obtuse. ©.1 to 2 inches high. Flowers saturate blue. 
2. cerulea. Smootn: radical leaves ovate, spathulate; stem 
dichotomous, peduncles 1-flowered, very long; segments 
' of the corolla oblong oval, with acute points. 3. serpylli- 
folia. 4. tenella, Pursu. 5.rogundifolia. Peduncles axillary. 
6. longifolia, (H. angustifolia, Micu.) 
7. *temufolia. Smooth; stem erect, divaricate, extreme- 
ly branched; leaves very narrow and linear; ramuli sub- 
trichotomous, flowers terminal, subfastigiate, corymbu- 
lose, long and setaceously pedunculate. 
Stem about 6 inches high, dichotomously subdivided 4 
or S5times. Leaves an inch long, scarcely a line wide, 
nearly of an equal breadth, and somewhat acute. Pe- 
duneies setaceous, from half an inch to 1 inch long. 1 te 
3 and 4-flowered. Calix 4-cleft, setaceous Flowers small. 
—Near the confluence of Pidgeon river, and the French 
Broad, Tennessee, on dry gravelly hills. . 
8. purpurea. Flowers subcampanulate, stamens exsert- 
ed beyond the tube of the corolla 
es With the exception of the splendid Houstonia coccinea, 
- of Mexico, this genus is thus far confined 10 the United 
States. © . 
197, POLYPREMUM. L, 
Calix 4 parted. Corolla 4-cleft, rotate, beard- 
: ed at the orifice. Stamina included. Capsule” 
| compressed, 2-celled, many-seeded. 
“Herbaceous, erect, or procumbent, dichotomous; leaves 
"Opposite, membranaceously connate; flowers small, di- — 
_. chotomal ‘and terminal, each surrounded by a bracteal _ 
_ involucrum. — 4 ce eas 
ss Species. 1. P. procumbens. A genus consisting of 
+ bat a single species, peculiar to the United States, and 
extending from Virginia to the Gulf of Mexico; nearly al. 
allied to Houssonia, differing principally in habit.” 
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