TERNSTRCEMIACE^. (tEA OR CAMELLIA FAMILY.) 95 



flowers 2" broad; pods ovate -conical, rather longer than the calijz. — Low 

 grounds, everywhere. 



13. H. gymnanthum, Engelm. & Gray. Almost simple, with strict 

 stem and hraiiclies (1 -3° high) ; leaves clasping, lieart-sliaped, acute or obtuse ; 

 cyme naked, the floral leaves reduced to small awl-shaped bracts; in aspect 

 approaching the next. (II. mutilum, var. gymnanthum, Cinn/.) — Del. and 

 Penn. to Minn., and southward. 



14. H. Canadense, L. Stem strict (6-15' high), with the branches 

 erect; leaves linear, 3-nerued a,t the hsLse, ohtwse ; cymes naked; flowers deep 

 yellow, 2-3'' broad when expanded • pods conical-oblonr/, usualli/ much lon^/er 

 than the cali/x. — Wet, sandy soil ; common. June - ( )ct. — Yar. :\iX..jrs, ( iray, 

 is a large form, 1 -2° high, with lanceolate leaves lY long, 3" wide, the upjier 

 acute. L. Superior, Rabbins; S. New York and southward. — Yar. Mixi.-\rrM, 

 Chois., a simple few-flowered form, 1 -3' high, with oblong obtuse leaves. 

 Ou wet rocks, Wise, and northward. 



* * Stems fastiyiatelj branched; leaves linear or bract4ike, ascending or 



appressed. 



15. H. Drummondii, Torr. & Gray. Stem and the mostly alternate 

 bushy branches rigid, erect (10- 18' high) ; leaves linear-sidjulate, nearly erect, 

 l-nerved (3 - 9" long) ; Jloivers scattered along the upper part of the leafy 

 branches, shori-pedicelled ; pods ovoid, not longer than the calijx. — W. 111., 

 Iowa, Kan., and southward, in dry soil. 



16. H. nudicaule, Walt. (Orange-grass. Pixe-wep:i).) Stem and 

 bushy branches thread-like, wiry (4 -9' high); leaves minute aicl-shaped scales, 

 appressed ; Jioicers minute, mosth/ sessile and scattered along the erect branches ; 

 pods ovate-lanceolate, acute, much longer than the cali/x. (II. Sarotbra, Michz.) 

 — Sandy fields, N. Eng. to 111., Mo., and soutliward ; common. June -Oct. 



3. E L 6 D E S, Adans. Marsh St. Johx's-wort. 



Sepals 5, equal, erect. Petals 5, equal-sided, oljlong, naked, imbricated in 

 the bud. Stamens 9 (rarely more), united in 3 sets ; the sets separated by as 

 many large orange-colored glands Pod 3-celled, oblong , styles distinct. — 

 Perennial herbs, in marshes or shallow water, with small close clusters of 

 flesh-colored flowers in the axils of the leaves and at the summit of the stem. 

 (Name e\a>5r}s, growing in ma?-s/?es, accidentally changed to Elodea by Jussieu, 

 who was followed by Pursh, etc.) 



1. E. campanulata, Pursh. Leaves closelij sessile or clasping bg a broad 

 base, oblong or ovate, very obtuse ; filaments united below the middle. (E. 

 Virginica, Nntt.) — Common in swamps ; 1 - 2° high. July, Aug. 



2. E. petiolata, I'ursh. Taller, more branching; leaves tapering into 

 a short jtetiole, oblong : filaments united beyond the middle. — From Va. south 

 and westward. 



Order 19. TEKNSTKCEMIACE^E. (Tea or Camellia 



Family.) 



Tj'ees or shrubs, with alternate simple feather-veined leaves, arid no stip- 

 ules, the regular Jlowers hypogynous and polyandrous, the sepals and petals 



