HuDsoNiA. XIX. ClSTACEiE. 181 



1. L.MAJOR, Michx. (L. villo.sa. J5J/Z. L,. minoT. Linn.) Larger Pinweed. 



Erect, hairy; branches villous, radical ones prostrate; canlin4:lvs. ellipti- 

 cal, mucronate, those of the radical branches roundish, minute; Jls. small, nu- 

 merous, in fasciculate racemes, somewhat 1-sided. — In dry woods, U. S. and 

 Can. Stem 1— 2f high, rigid, brittle, hairy, purple, ])aniculately branched. 

 Leaves of the stem about l' long, alternate, opposite, or even verticillate on 

 the prostrate branches, crowded. Flowers brownish-purjile, inconspicuous. 

 Capsule roundish, about the size of a large pin-head, Jl, Aug. 



2. L. MINOR. Lam. Smaller Pinvxed. 



Erect, smoothish, branched ; lis. linear-lanceolate, acute ; panicle leafy, 

 its branches elongated ; Jls. in nearly simple racemes ; caps, rather large.— Grows 

 in dry, sandy grounds, tJ. S. and Can. Stem 8 — 12' high, often decumbent at 

 base. Stem' leaves, G — 10" by 2 — 3", alternate, sparingly ciliate and revolute 

 at the margin, those of the long slender branches minute. Flowers nearly 

 twice as large as in L. major. Petals browmish purple, cohering at apex. Cap- 

 sule also rather larger than in L. major, Jn. — Sept. 



3. L. THYMiFOLiA, Ph. Thyvie-Uavcd Pinweed. 



Frutescent; sts. decumbent at base, hoary with appressed hairs, very 

 branching and leafy ; root Ivs. on the short radical branches, imbricate, ellipti- 

 cal, very small; caulinc Ivs. linear or oblanceolate, often whorled. Sea-coasts, 

 Mass. ! to N, J. Stem about If high, rigid and very bushy. Upper leaves about 

 1' long, erect and crowded. Flowers in terminal and axillary clusters, on very 

 short pedicels. Petals brow^n. Capsules globose, Jl, — Sep. 



2, HELIANTHEMUM. 



Gr, {i\ios, the sun, av^oi, a flower. 



Sepals 5, the 2 outer smaller ; petals 5, or rarely 3, sometimes 

 abortive ; stamens 00 ; stigmas 3, scarcely distinct ; capsule triangu- 

 lar, 3-valved, opening at top ; seeds angular. — Fls. yellow. 



1,H, Canadense. Michx, (Cistus Canad, Willd.^ Frost Plant. Rock Rose. 



St. ascending ; branches erect, pubescent ; Ivs. alternate, without stipules, 

 lanceolate, acute, hairy; petaliferousjls. few, large, terminal, ff;;cteZoi/.^ ones late- 

 ral, solitary or racemose, — In dry fields and woods, Can. to Flor, Stem about 

 If high, at length shrubby at ba.se. Leaves 8—12" long, i as wade, entire, sub- 

 sessile. Flowers with large bright >;ellow petals, in a terminal corymb. The 

 axillary flow^ers later, very small, with very small petals, or apetalous. Sta- 

 mens declinate. Capsule smooth, shining, those of the apet. fls. not larger than 

 a pin's head. Seeds few, brown. Jn. — Sep, 



2. H, coRYMBosuM, Michx. (Heteromeris cymosa. Spach.) 



St. branching, canescent, erect ; Ivs. lance-oblong, canescently tomentose 

 beneath ; fls. in crowded, fastigiate cymes, the primary ones on elongated, filitorm 

 pedicels, and wdth petals twice longer than the calyx; scp. villous-canescent, 

 outer ones linear, obtuse, inner ovate, acute. — Sterile sands, N. J. to Ga. Plant 

 somew^hat shrubby, very tomentose when young, at length diffusely branched, 

 about If high. Primary flowers about 1' diam. Secondary ones small, apeta- 

 lous. Jn, — Aug. 



3. HUDSONIA. 



In honor of Wm. Hudson, author of " Flora Anglica." 



Sepals 3, united at base, subtended by 2 minute ones at dase ; pe- 

 tals 5 ; Stamens 9—30 ; style filiform, straight ; capsule 1 -celled, 3- 

 valved, many-seeded. — Low shrubs with very numerous branches^ and 

 minute cxstipulate Ivs. 



1 H. TOMEN'TosA, Nutt, Dowuv Hiulsoma. 



Hoary-tomentose ; Ivs. ovate, imbricate, acute, shorter than the mteryals 

 of the stem ; fls. subsessile ; pet. obtuse.— Shores of the ocean and lakes, N. J, 

 to N H. ! and Wise, &c. Plant consisting of numerous slender, ascendmg 



