252 HYDROPHYLLACE^. 



or with 5 plaits. Stamens inserted into the upper part of the 

 tube. Nuts somewhat drupaceous, smooth, or reticulate and 

 rugose. 



1. M. Virginica D. C. : smooth ; stem erect ; radical leaves obovate- 

 oblong, obtuse ; cauline narrower ; calyx three or four times shorter than 

 the tube of the corolla. Pulmonaria Virginica Linn. Liihospermum jml- 

 chrum Lehvi. 



Wet grounds. N. Y. to Car. W. to Miss. May. %.—Stem. 8—12 inches 

 high, succulent, mostly simple. Leaves smooth and a little glaucous. Flowers 

 large, bright blue, in a loose racemose panicle. The plant turns black by dry- 

 ing. Virginian Cowslip. Lungwort. 



2. M. marilivia G. Don : stem procumbent or ascending, branched ; 

 leaves ovate, rough with callous dots, fleshy, glaucous ; upper lanceolate ; 

 calyx about half as long as the corolla. (Z>.C.) Pulmonaria maritima Linn, 

 Liihospermum maritimum Lehm. 



Sea shores. N. Eng. Pursh. N. to Subarct. Amer. July. %. — Stem dif- 

 fuse, much branched. Lotver leaves on petioles and acute ; upper ones sessile. 

 Flowers purplish-blue, in leafy racemes. Seaside Mertensia. 



3. M. denticulata G. Don : stem erect ; leaves nerved, somewhat glau- 

 cous, margin rough with minute teeth; radical ones ovate, petiolate; cau- 

 line elliptic, sessile ; segmeigp* of the calyx denticulate on the margin, three 

 or four times shorter than the corolla. {D. C.) Pulmonaria Slbirica Pursh 

 App. Liihospermum deniiculatum Lehm. 



Can. N. Y. ? W. to the Columbia river. June. "21-. — Skrni 6—10 inches 

 high. Leaves 3— 5-ner.ved. Flowers numerous, purple, in somewhat nodding 

 racemes. Denticulate Mertensia. 



Order LXXXIX. HYDROPHYLLACE^.— Hydrophyls. 



Calyx deeply 5-cleft, the sinuses often with appendages, per- 

 sistent. Corolla regular, shortly 5-cleft, mostly between cam- 

 panulate and rotate. Stamens 5, inserted into the corolla. 

 Ovary simple, 1 — 2-celled ; styles 2, united into 1 ; stigma 

 bifid. Fruit a capsule. Seeds few, reticulated, with abundant 

 cartilaginous albumen. — Herbaceous plants, often hispid, with 

 alternate lobed or pinnatifid leaves. Flowers in cymose clus- 

 ters, or in one-sided racemes. 



1. HYDROPHYLLUM. Linn. Water Leaf. 

 • (From the Greek vJwp, water, and (pvWov, a leaf.) 



Calyx 5-parted, the lobes subulate and the sinuses mostly 

 naked. Corolla campanulate, 5-cleft, with 5 longitudinal mar- 

 gined grooves on the inside alternating with the lobes. Sta- 

 mens exserted. Filaments bearded in the middle. Stigma 



