50 ORDER 17. DKOSERACE.'E. 



14 H. cistlfolium Lain Si 2-winged, mibsimple; ITS. linear-oblong, obtuse, ses- 

 cile ; flowers in a leafless, compound cyme. Ga. to Fla. and La. (No. 6, ft. ?) 



15 H. niidlflorum MX. St. and branches 4-angled and winged ; Ivs. ovate-lanceo 

 late or oblong, obtuse, sessile ; cyme leafless, peduncled ; sep. linear ; capsule almost 

 3-celled. V Wet. Penn. to La. and Ga. 1 2f. Leaves 2'. thin. 



16 H. splwerocarpon MX. St. obscurely 4-sided : Ivs. linear-oblong, obtuse, with 

 a minute callous tip : sep. ovate, mucronate : caps, globular, n Rivers, W. If. Fls. 7". 



17 Hi adpressmn Bart. St. 2-winged above; Ivs. linear-oblong, half erect: cymes 

 few- leaved; petals obovate. it R. I. to Ark. 



18 H. dolabrlforme Vent. St. scarcely 2-edged above; Ivs linoar lanceolate 

 spreading ; fls. in a leafy, fastisriate cyme ; pet. very oblique (dolabriform). 21 Ky.Tenr 



19 H. angulosum MX. Herb smooth ; st. acutely 4-cornered; Ivs. oblong-lanceo 

 late, acute ; cymes leafless : style distinct, thrice longer than the ov. li N. J. to Fla. 



20 H. elliptlcum Hook. Herb smooth ; st. quadrangular, Dimple ; Ivs. elliptical, oh- 

 tuse, somewhat clasping, pellucid-punctate : cyme pedunculate; sep. unequal; style 

 united to near the summit, as long as the ovary, y Can. to Pa. If. Flowers 6". 



21 H. jrraveoleiis Buckley. Stem terete, smooth; leaves oblong-ovate, clasping: 

 sepals and petals narrow ; styles 3. if High Mts., N. Car. Slrong-scented. 



22 H. piloKum Walt. Rough-downy; stem simple, terete, virgate; Ivs. ovate-lance- 

 olate, appressed. clasping, acute ; styles distinct. @ Pine-barrens, South. 1 2f. 



23 II. miitilum L. Stem square, branched; Ivs. ovate, 5-veined, clasping, obtuse , 

 cymes leafy ; pet. shorter (1") than sep. ; sta. 6 12. (I) Damp sandy soils. 3 9'. Com. 



/3. g-ymnantltum. Strict, simple or branched, cy. only bracted. Del., Penn. (Porter). 



24 H. Caiiadense L. Stem quadrangular, branched; Ivs. linear, attenuated to the 

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

 lanceolate, acute sepals ; stamens 5 10. (T) Wet sandy soils. Capsule red. 6 12'. 



25 H. Saruthra MX. Stem and branches filiform, erect, and parallel; Ivs. very mi 

 nute, subulate ; flowers sessile ; stam. 510. (T) Sandy soils. 4 12'. Fls. minute. 



26 H. Drummondii T. & G. Branches alternate ; Ivs. linear, very narrow; flow 

 ers pedicellate ; stamens 1020. fT) Dry. 111. and South. If. Leaves 6". 



3. ELODEA, Adams. ('EAoo5?/?, marshy; from the habit.) Sep. 5, 

 uqual. Pet. 5, equilateral, imbricated in bud. Stam. 9 (rarely more), tria- 

 delphous, the sets alternating with 3 orange-colored glands. Styles 3, dis- 

 tinct. Capsule 3-celled. U Herbs with pellucid-punctate leaves, the axils 

 leafless. Flowers dull orange-purple. July Sept. 



1 E. Vlrginlca Nutt. Stem erect, somewhat compressed, subsimple; leaves oblong, 



amplexicaul: stamens united below the middle, with 3 in each set. Swamps. If. 



2 E. petiolata Ph. Leaves oblong, narrowed at base into a petiole ; flowers mostly 



in 3's, axillary, nearly sessile ; filaments united above the middle ; caps, oblong, much 

 longer than the sepals. Swamps, S States, N. to N. J. Flowers smaller (4"). 



OKDER XVII. DROSERACE^E. SUNDEWS. 



Herbs growing in bogs, often covered with glandular hairs, with leaves 

 alternate or all radical, mostly circinate (rolled from top to base) in verna- 

 tion. Flowers regular, hypogynous, 5-merous, the Sepals, Petals, and Sta- 

 mens persistent (withering). Ovaries compound, 1-celled, with the Stylet 

 and Stigmas variously parted, cleft, or united. Seeds oo in the capsule, 

 albuminous. Embryo minute. 



Stamens 5. Styles distinct. Seeds on the valvei of the capsule DROSERA. ] 



Stame is 1015. Styles united. Seeds all at the base of the cell . 



