12. H. mùltilum, L. Stem flaccid, widely branching (6--20´ high); _leaves ovate to narrowly oblong, obtuse, partly clasping, 5-nerved_; cymes leafy; flowers 2´´ broad; _pods ovate-conical, rather longer than the calyx_.--Low grounds, everywhere. 13. H. gymnánthum, 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. Canadénse, 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. MÀJUS, Gray, is a large form, 1--2° high, with lanceolate leaves 1½´ long, 3´´ wide, the upper acute. L. Superior, _Robbins_; S. New York and southward.--Var. MINIMUM, Chois., a simple few-flowered form, 1--3´ high, with oblong obtuse leaves. On wet rocks, Wisc., and northward. [*][*] _Stems fastigiately branched; leaves linear or bract-like, ascending or appressed._ 15. H. Drummóndii, Torr. & Gray. Stem and the mostly alternate bushy branches rigid, erect (10--18´ high); _leaves linear-subulate_, nearly erect, _1-nerved_ (3--9´´ long); _flowers scattered_ along the upper part of the leafy branches, _short-pedicelled; pods ovoid, not longer than the calyx_.--W. Ill., Iowa, Kan., and southward, in dry soil. 16. H. nudicaùle, Walt. (ORANGE-GRASS. PINE-WEED.) Stem and bushy branches thread-like, wiry (4--9´ high); _leaves minute awl-shaped scales, appressed; flowers minute, mostly sessile_ and scattered along the erect branches; _pods ovate-lanceolate_, acute, _much longer than the calyx_. (H. Sarothra, _Michx._)--Sandy fields, N. Eng. to Ill., Mo., and southward; common. June--Oct. 3. ELÒDES, Adans. MARSH ST. JOHN'S-WORT. Sepals 5, equal, erect. Petals 5, equal-sided, oblong, 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 ἑλώδης, _growing in marshes_, accidentally changed to ELODÈA by Jussieu, who was followed by Pursh, etc.) 1. E. campanulàta, Pursh. _Leaves closely sessile or clasping by a broad base_, oblong or ovate, very obtuse; filaments united below the middle. (E. Virginica, _Nutt._)--Common in swamps; 1--2° high. July, Aug. 2. E. petiolàta, Pursh. Taller, more branching; _leaves tapering into a short petiole, oblong_; filaments united beyond the middle.--From Va. south and westward. ORDER 19. TERNSTRŒMIÀCEÆ. (TEA OR CAMELLIA FAMILY.)