188G.] ROTANIOAL fJAZETTE. 109 



24. H. aiia^alloides Cham. S: ScHLEfirr. Often forming 

 dense mats: stenis an inch to a foot long: leaves oblong to 

 broadly ovate, very obtnse, 5 to 7-nerved at base, 2 to 6 lines 

 long, almost as broad : flowers 3 or 4 lines in diameter, in few- 

 flowered naked or leafy cymes: sepals foliaceons, nnecjual, lanc(! 

 olato to broadly ovate, longer than the ovate capsules: stamens 

 15 to 20. — Linntca, iii. 127; Torr. & Gray, Fl. i. 107 and (j74. 



? H. mulilum Watson, King's Report, v. 46. 



In wet ground from Southern California to Washington Territory, Mon- 

 tana ( WaUon), and British Columbia. Also in adjacent Mexico. 

 Possibly this is but a form of H. Japonicum Thunb. 



25. H. iiiutiluiii L. Like the last, but more erect and dif- 

 fusely branching, a half to a foot (or even two feet) high : leaves 

 narrowly oblong to somewhat ovate, half to an inch long, 2 to 4 

 lines wide, 5-nerved at base: flowers in very loose leafy cymes: 

 sepals linear to lanceolate, usiiallv shorter than the ovate capsule : 

 stamens (J to 12 —Spec. 787; Torr. & Gray, Fl. i. 164. 



//. quinquenervium Walter, Fl. Car. 190 ; Chois. in DC. Prodr. i. 550 ; Hook. 

 Fl. Bor.-Am. i. 110. 



JI. parviflomm Willd. Spec. iii. 1456; Pursh. 377. 



H. stellarioides HBK. Nov. Gen. v. 196. 



Low grounds, from Canada to Florida and Texas. Also in adjacent 

 Mexico. 



Quite variable in size, and in some forms closely resemblinj^ the last spe- 

 cies. 



■** Almost simple, with strict stems and branches: (lowers in naked cymes: 

 sepals linear to linear-lanceolate, acuminate. 



26. H. syiniianthiim Exgei-m. & Gray. A f)ot to three 

 feet high : leaves cordate-ovate, clasping, often quite distant, half 

 inch or more long, 5 to 7-nerved and 3 to 5 lines wide at base, 

 tapering to an acute or obtuse apex : flowers in strict mostlv few- 

 flowered elongated cymes: sepals a line or two long, about as 

 long as the ovate-conic capsule : stamens 10 to 12. — IM. Lindh. 

 4; Walp. Ann. ii. 188. 



II. mulilum var. gymnanthum Gray, Manual, 86. 



Delaware, Pennsylvania and Illinois, to Louisiana and Texas. 



The strict habit and naked cymes reseml)K' tiic following species. Lithe 

 Bcrichle der DeulHchen ButuiiUchcn (IfxrlUrluift for Feb. 1SS5, R. v. I'echtritz and 

 P. Ascherson refer this species to //. Japonicum Tliunb. They well establish it 

 as a species distinct from H. miuilum, but an examination of many specimens 

 of II. .Japonicum shows it to be very distimt from that species also. If II. 



