Class IV. Order I. 



nus. It is found in woods about the roots of trees, creeping in 

 the decayed leaves. Stems furnished with opposite, round, or 

 heart shaped, smooth, petioled leaves, about the size of the 

 finger nail. Corollas purplish white, funnel form, four cleft, 

 hairy within, bearing the stamens in their sinuses. The most 

 remarkable circumstance in this genus is that two calyxes and 

 corollas stand on a common germ, so that two apparent flowers 

 produce only one berry. The blossoms are exceedingly fra- 

 grant, and the leaves sometimes variegated. June, July. Per- 

 ennial. 



44. HOUSTONIA. 

 HOUSTONIA OJERULEA. L. Bluish Houstonlo, 



Root leaves ovate ; stem compound ; first pe- 

 duncles two flowered. L. 



Common among the grass in moist ground, flowering in 

 May and afterward. The stems are slender, repeatedly forked, 

 the divisions supporting single flowers. The root leaves are 

 spatulate or oval, tapering into footstalks ; those of the stem 

 opposite, situated at the forks and elsewhere, lance-oval, the 

 upper ones sessile. Flowers not larger than violets, with which 

 they grow, bluish white, yellow at the centre, consisting of a 

 slender tube with four cross shaped spreading segments. Per- 

 ennial. 



HOUSTONIA LONGIFOLIA. Willd. Long leaved Hoiistonia. 



Leaves lanceolate, narrowed at each end ; flow- 

 ers corymbed. Willd. 



Found in dry soils at Blue hills and elsewhere, not common- 

 ly exceeding four or five inches in height. Stem erect, four 

 sided, branching toward the top. Leaves opposite, lanceolate, 

 somewhat obtuse. Flowers purplish, in a terminal corymb. 

 June, July. Perennial. 



