TERNSTRCEMIACE.E. (TEA OR CAMELLIA FAMILY.) 95 



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

 grounds, everywhere. 



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

 stem and branches (1-3 high ) ; leaves clasping, heart-shaped, acute or obtuse ; 

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

 approaching the next. (H. mutilum, var. gymnanthum, Gray.) Del. and 

 Penn. to Minn., and southward. 



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

 erect ; leaves linear, 3-nerved at the base, obtuse ; cymes naked ; flowers deep 

 yellow, 2 - 3" broad when expanded ; pods -conical-oblong, usually much longer 

 than the calyx. Wet, sandy soil ; common. June - Oct. Var. M\JUS, Gray, 

 is a large form, 1-2 high, with lanceolate leaves 1^' long, 3" wide, the upper 

 acute. L. Superior, Robbins ; S. New York and southward. Var. MINIMI M, 

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

 On wet .rocks, Wise., and northward. 



* Stems fastigiatdy branched; leaves linear or bract-like, ascending or 



oppressed. 



15. H. Drumm6ndii, Torr. & Gray. Stem and the mostly alternate 

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

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

 branches, short-ped icelle d ; pods ovoid, not longer than the calyx. W. 111., 

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



16. H. nudicaule, Walt. (ORANGE-GRASS. PINE-WEED.) Stem and 

 bushy branches thread-like, wiry (4 -9' high) ; In-es minute aid-shaped scales, 

 oppressed ; flowers minute, mostly sessile and scattered along the erect branches ; 

 pods ovate-lanceolate, acute, much longer than the calyx. (H. Sarothra, j\lichx.) 

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



3. EL ODES, Adans. MARSH ST. JOHN'S-WORT. 



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

 the bud. Stamens 9 (rarely more), unitc-d 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\w5ris,grou-ing in marshes, accidentally changed to ELODEA by Jussieu, 

 who was followed by Pursh, etc.) 



1. E. campanulata, Pursh. Leaves closely sessile or clasping by a broad 

 l>< me, oblong or ovate, very obtuse ; filaments united below the middle. (E. 

 Virginica, Nutt.) Common in swamps; 1-2 high. July, Aug. 



2. E. petiolata, Pursh. Taller, more branching; leaves tapering into 

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

 and westward. 



ORDER 19. TERNSTRCEMIACE^E. (TEA OR CAMELLIA 



FAMILY.) 



Trees or shrubs, with alternate simple feather-veined leaves, and no stip- 

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



