202 KEY AND FLORA 



I. HYDROPHYLLUM L. 



Coarse perennials. Leaves large, petioled. Flowers white 

 or pale blue, inconspicuous. Calyx 5-parted, sometimes ap- 

 pendaged at the notches. Corolla bell-shaped, 5-cleft, with 

 5 double, nectar-bearing folds inside. Stamens projecting, 

 the filaments bearded. Style projecting ; ovary covered with 

 bristly hairs, the placentae very broad and fleshy, inclosing 

 the ovules. Capsule globular, 1-4-seeded. 



1. H. macrophyllum Nutt. A coarse, rough-hairy plant, about 1 ft. 

 high, from scaly-toothed rootstocks. Leaves oblong, pinnate and pin- 

 nately cut, the divisions mucronate, obtuse, coarsely toothed. Flower 

 cluster dense, globular, long-peduncled. Flowers about |- in. long. 

 Calyx little or not at all appendaged, its lobes broad at the base, 

 but with slender, tapering points. Corolla white. Rich, rocky woods 

 W. and S. 



2. H. virginianum L. Nearly smooth, 1-2 ft. -high, stem often fork- 

 ing at the base. Leaves of the stem mostly near the top, pinnately 

 cut into 5-7 divisions ; lobes oval-lanceolate, deeply serrate, the 

 lowest ones distinct; petioles of the basal and lower leaves 4-8 in. 

 long. Flower clusters on peduncles longer than the petioles of the 

 upper leaves, from the axils of which or opposite which they arise. 

 Flowers about ^ in. long. Calyx not appendaged, its lobes narrowly 

 linear, bristly-margined. Corolla whitish, with purplish veins. Moist 

 woods. 



3. H. appendiculatum Michx. Hairy, 1-H ft. high. Stem leaves pal- 

 mately 5-lobed, the lobes acute, toothed, lowest ones pinnately divided. 

 Flower cluster rather loose. Calyx appendaged at the notches. Corolla 

 blue. Stamens projecting from the corolla little or not at all. Moist 

 woods. 



H. ELLISIA L. (MACROCALYX) 



Delicate, branching annuals. Leaves pinnately lobed or 

 divided. Flowers small, whitish. Calyx without appendages, 

 5-parted, enlarged and leafy in fruit. Corolla bell-shaped or 

 cylindrical, little if any longer than the calyx, 5-lobed, with 

 5 minute appendages within the tube. Placentas, fruit, and 

 seeds nearly as in Hydrophyllum. 



1. E. Nyctelea L. Plant somewhat roughish-hairy, 6-12 in. high. 

 Leaves pinnately parted or divided. Peduncles 1-flowered, opposite 

 the leaves. Corolla whitish. Pod globose, finally pendulous. In damp, 

 shady places. 



