HYDROPHYLLACEAE (WATERLEAP FAMILY) 677 



cymose-clustered flowers. (Name formed of v5w/>, water, and 0JX\ov, leaf; of 

 no obvious application.) 



* Calyx with minute if any appendages ; rootstocks creeping, scaly-toothed. 



1. H. macrophyllum Nutt. Hough-hairy ; leaves oblong, pinnate andpinnati- 

 fid ; the divisions 9-13, ovate, obtuse, coarsely cut-toothed ; basal leaves 2-3.5 dm. 

 long ; peduncle shorter than the petiole ; calyx-lobes lanceolate-pointed from a 

 broad base, very hairy; flowers 1 cm. or so long, crowded in a globular cluster; 

 anthers short-oblong. Rich woods, Va. to O., 111., and southw. May, June. 



2. H. virginianum L. Smoothish, 2-7 dm. high ; leaves pinnately divided ; 

 the divisions 5-7, ovate-lanceolate or oblong, pointed, sharply cut-toothed, the 

 lowest mostly 2-parted, the uppermost confluent ; peduncles longer than the 

 petioles of the upper leaves, forked ; calyx-lobes narrowly linear, bristly-ciliate ; 

 flowers 1 cm. or less long; anthers oblong-linear. Rich woods, N. H. and 

 w. Que., westw. and southw. May- Aug. H. patens Britton, indistinguishable 

 as to foliage, is said to differ in its somewhat more ciliate petioles, appressed 

 calyx-lobes, and more spreading corolla-lobes. 



3. H. canadSnse L. Nearly smooth, 2-7 dm. high ; leaves 0.5-2.6 dm. broad, 

 palmately &-1 -lobed, rounded, heart-shaped at base, unequally toothed, those 

 from the base sometimes with 2-3 small and scattered lateral leaflets ; peduncles 

 mostly shorter than the petioles, forked, the nearly white flowers on very short 

 pedicels; calyx-lobes linear-awl-shaped, nearly smooth, often with minute teeth 

 in the sinuses. Damp rich woods, s. w. Vt. and w. Mass, to Ont., 111., Ky., 

 and N. C. June-Aug. 



* * Calyx with a small reflexed lobe in each sinus ; stamens little exserted. 



4. H. appendiculatum Michx. Hairy; stem-leaves palmately 5-lobed, 

 rounded, the lobes toothed and pointed, the lowest pinnately divided ; cymes 

 rather loosely flowered ; filiform pedicels and calyx bristly-hairy. Damp woods, 

 N. Y. and Out. to Minn., and southw. May, June. 



2. NEM6PHILA Nutt. 



Corolla bell-shaped or almost wheel-shaped ; lobes convolute in the bud ; 

 tube mostly with 10 small folds or scales inside. Placentae (bearing each 2-12 

 ovules), capsule, and seeds as in Hydrophyllum. Diffuse fragile annuals, with 

 opposite or partly alternate pinnatifid or lobed leaves, and 1-flowered peduncles. 

 (Name from i/^os, a grove, and <j)i\lv, to love?) 



1. N. micr6calyx (Nutt.) Fisch. & Mey. Small, roughish-pubescent ; stems 

 diffusely spreading, 0.5-4 dm. long ; leaves parted or deeply cleft into 3-5 

 roundish or wedge-obovate sparingly cut-lobed divisions, the upper all alternate ; 

 peduncles opposite the leaves, shorter than the long petioles ; flowers minute ; 

 corolla white, longer than the calyx ; placentae each 2-ovuled ; capsule 1-2- 

 seeded. Moist woods, Va. to Fla., w. to Ark. and Tex. Apr. -June. 



3. ELLISIA L. 



Corolla bell-shaped or cylindraceous, not longer than the calyx, 5-lobed 

 above , the lobes imbricated or convolute in the bud, the tube with 6 minute 

 appendages within. Placentae (each 2-ovuled), fruit, and seeds much as in 

 Hydrophyllum. Delicate and branching annuals, with lobed or divided leaves, 

 the lower opposite, and small whitish flowers. (Named for John Ellis, distin- 

 guished naturalist and correspondent of Linnaeus.) MACROCALYX Trew. 



1. E. NyctSlea L. Minutely or sparingly roughish- hairy, divergently 

 branched, 1-4 dm. high; leaves pinnately parted into 7-13 lanceolate or 

 linear-oblong sparingly cut-toothed divisions ; peduncles solitary in the forks 

 or opposite the leaves, 1-flowered ; calyx-lobes lanceolate, pointed, about the 

 length of the cylindraceous corolla, in fruit ovate-lanceolate, 1 cm. long ; cap- 

 sule pendulous. Shady damp places, N. J. to Sask., and southw. ; casual 

 northeastw. Apr.-July. 



