356 HYDROPHYLLACE^E. (wATERLEAF FAMILY.) 



Var. brevistylis, Gray. Flowers smaller ; stamens and style not longer 

 than the corolla. Alabama (Buckley). 



2. COSMANTHUS. Ocules and seeds 4 : corolla not appendayed within, the 

 lobes Jimbriate : Jilaments hairy below. 



2. P. Purshii, Buckley. Stems erect or ascending, clustered, smooth 

 or hairy, branched; leaves hirsute; the lower ones petioled, almost pinnate, 

 the upper clasping, piunatifid, with the lobes acute ; racemes many-flowered ; 

 calyx lobes lanceolate-linear, bristly ciliate ; corolla blue. (P. fimbriata, 

 Pursh.) Shady banks in the upper districts. May -June. Stem 8' -12' 

 high. Corolla ' wide. 



3. P. fimbriata, Michx. Smoothish or slightly hairy; stems spreading 

 or ascending ; leaves few, the lowest petioled, with 3-5 roundish leaflets ; the 

 upper ones pinuately 5-7-lobed, with the lobes obtuse; racemes 3-10-flow- 

 ered ; calyx lobes linear-oblong, obtuse ; corolla white. High mountains of 

 North Carolina. May. Stems 5' - 8' long. 



Var. < Boykini, Gray. "More robust; racemes rather many-flowered, 

 at length strict, with fruiting pedicels erect and not longer than the calyx ; 

 corolla far less fimbriate, bluish." Upper Georgia (Boi/kin). 

 3. COMANTHOIDES. Ovules commonly more than 4 : corolla usually with 

 minute appendages within, the lobes entire. 



4. P. parviflora, Fursh. Pubescent ; stems several, spreading, branch- 

 ing ; leaves petioled ; the lowest 3 - 7-lobed, the upper 3-parted ; racemes 

 loosely 5 - 1 5-flowered ; pedicels slender, much longer than the calyx; calyx 

 lobes linear-oblong, bristly-ciliate ; corolla small, pale blue or white. Shady 

 banks, Georgia, and northward. April -May. Stems 3' -8' high. Corolla 

 3" -\" wide. Capsule few-seeded. 



Var. hirsuta, Gray. More hirsute, with stouter stems, and larger (5"- 

 1" wide) corolla. Stone Mountain, Georgia. 



4. HYDROLEA, L. 



Calyx 5-parted. Corolla short, bell-shaped, 5-cleft ; the lobes spreading. 

 Stamens somewhat exserted, with the filaments dilated at the base: anthers 

 sagittate. Styles 2 (rarely 3), separate. Capsule globose, 2-celled, or imper- 

 fectly 4-celled by the introversion of the placentae, 2-valved. Herbs, growing 

 in water or muddy places, with" entire leaves, often with spines in their axils, 

 and bine axillary or corymbose flowers. 



1. H. COrymbosa, Ell. Spineless; stem erect, hirsute and branching 

 above ; leaves ovate-lanceolate, sessile ; flowers in a close terminal corymb ; 

 calyx lobes lanceolate, one third as long as the corolla. Pine barren ponds, 

 Florida to South Carolina. July- August. Stem l-2 high. Leaves 1'- 

 1 \' long. Corolla " azure, with yellowish veins and 5 white spots near the base." 



2. H. quadrivalvis, Walt. Spiny ; stem ascending from a creeping 

 base, hispid, mostly simple ; leaves lanceolate, tapering into a petiole ; flowers 

 axillary, the lower ones clustered, short-peduncled ; calyx lobes linear, nearly 

 as long as the corolla; stamens included; capsule almost 4-celled by the in- 

 troversion of the placeutce. Pools and muddy banks. July - August. 

 Stem 1 - 3 long. Leaves 3' - 4' long. 



