250 Obobe 18.— HYPEEICAOB^. 



18 H. spheerocarpon Mx. St. obscurely i-sided ; Ivs. linear-oblong, obtuse^ 

 with a minute callous tip, almost veinless ; cyme compound, nearly leafless, pedun- 

 culate; Sep. ovate, mucronate; sty. closely united; caps, globular. — Rooky banks 

 of the Ohio and Ky. rivers. St. somewhat woody at base, 10 — 15' high. Lvs. 

 1—2' long, J as wide, closely sessile, with large, pellucid dots. Fls. at length 

 numerous, 7" diam. Jl. 



19 H. angulosum Mx. Beri smooth ; st. acatdy i-cornered ; lvs. oblong-lanceolate, 

 acute ; cymes leafless ; sty. distinct, thrice larger than the ovary. — Swamps in pine 

 barrens, KT. J. to Fla. (Bainbridge, Ga., Misses Keen). St nearly 2f high. Lvs. 

 distinct, opaque, scarcely punctate, 8 — 12" long, 1 — 3" wide, edges revolute. 

 Fls. often alternate on the ultimate branches. Sepals ovate, striate, acute, 5 

 times shorter than the orange-colored petals. Jl. 



20 H. ellipticum Hook. Herb smooth; st. quadrangular, simple; lvs. ellipticai, 

 obtuse, somewhat clasping, pellucid-punctate; cyme pedunculate; sep. unequal; 

 sty. united to near the summit, as long as the ovary. — % Low grounds Can. to 

 Penn. St. 8 — 16' high, slender, colored at base. Lvs. 8 — 13" by 2—4", some- 

 what erect, about as long as the internodes. Cymes of about a dozen flowers, 

 generally 1 or 2' above the highest pair of leaves. Central fls. subsessile. Petals 

 acutish, orange-yellow, 2 — 3" long; sep. shorter. Stig. minute. Jl. 



21 H. gravSolens Buckley. St. terete, smooth, nearly simple; lvs. oblong-ovate, 

 clasping, punctate beneath; cymes terminal and axillary; sep. and pet. narrow; 

 fiL CX); styles 3. — High Mts., N. Car. (Buckley). Plant with a strong odor. 

 Stem 2 — 3f high. Lvs. 2' long, half as wide. Pis. large and numeroua 

 Jl.— Aug. 



22 H. pilosum Walt. Serl) rough-downy; st. simple, terete, virgate; lvs. ovate- 

 lanceolate, appressed, clasping, acute ; cyme few-iiowered ; sty. distinct, as long aa 

 the ovary.— <1) "Wet pine barrens, S. Oar. to Pla. and La., common. Lvs. 4 — 8" long, 

 ^ as wide, very acuta. St. 1 — 3f high, quite simple to near the top, clothed witti 

 a rough coat ot hairs. Fls. 5 — 6" diam., mostly alternate on the branches of the 

 cyme. Jn. — Sept. 



23 H. miitilTiin L. Dwabp St. John's "Wort. St. quadrangular, branched ; 

 lvs. oituse, ovate-oblong, clasping, 5-veined, minutely punctate; cymes leafy; pet. 

 shorter than the sep. ; sta. 6 — 12. — (D Damp sandy soils, Can. to Ga., W. to Ind. 

 St. 3 — 6 — 9' high. Lvs. closely sessile, . apparently cormate, 4 — 8" by 2 — 5", 

 outer veins obscure. Fls. minute, orange-colored. Jl, Aug. 



24 H. CanadSiise L. St. quadrangular, branched; lvs. linear, attenuated to the 

 base, with pellucid and also with black dots, rather obtuse ; pet shorter than the 

 lanceolate, acute sep. ; sta. 5 — 10. — (D "Wet sandy soils. Can. to Ga. St 6 — 12' 

 high, -slightly 4-winged. Lower branches opposite, upper pair forked. Lvs. 

 8 — 12" by ^ — 1 or 2", sometimes linear-lanceolate, radical ones obovate, short 

 Pis. small, orange-colored. Ova. longer than the gtyles. Caps, red, very acute, 

 twice as long as the sepals. Jn. — Aug. 



25 H. Sarothra Mx. St and branches filiform, quadrangular; lvs. very minute, 

 subulate; fls. sessile; sta. 5 — 10. — (D St. 4 — 8 — 12' high, branched above into 

 numeroua, very slender, upright, parallel branches apparently leafless, from the 

 minuteness of the leaves. Pis. very small, yellow, succeeded by a conical brown 

 capsule which is twice the length of the sepals. Jl., Aug. 



26 H. Drumtaondii Torr. & Gr. Branches alternate, square above; lvs. linear, 

 very narrow, acute, longer than the internodes; fls. pedicellate; sta. 10 — 20; 

 sep. lanceolate, shorter than the petals, but longer than the ovoid capsule. — 

 (D Near St. Louis, to Ga. and La. Plant more robust than the last, 10 — 20' high, 

 very branching. Lvs. J' long. Fls. about 4" diam. 



3. EL0D£A, Adams. (Gr. &Xudrjg, marshy ; from the habitat of the 

 plants.) Sepals 5, equal, somewhat united at base; petals 5, deciduous, 

 equilateral; stamens 9 (rarely more), triadelphous, the parcels alter- 

 nating with 3 hypogynous glands ; styles 3, distinct ; capsule 3-celIed. — 

 H Herbs with pellucid-punctate lvs., the axils leafless, Fls. dull orange- 

 purple. 



