Hopsonia. XIX. CISTACEZE. 181 
1. L. Masor. Michx. (L. villosa. Ell. L. minor. Linn.) Larger Pinweed. 
Erect, hairy; branches villous, radical ones prostrate ; cauline lws. ellipti- 
cal, mucronate, those of the radical branches roundish, minute; fls. small, nu- 
merous, in fasciculate racemes, somewhat 1-sided.—In dry woods, U. S. and 
Can. Stem 1—2f high, rigid, brittle, hairy, purple, paniculately branched. 
Leaves of the stem about 1’ long, alternate, opposite, or even verticillate on 
the prostrate branches, crowded. Flowers brownish-purple, inconspicuous. 
Capsule roundish, about the size of a large pin-head. Jl. Aug. 
2. L. minor. Lam. Smaller Pinweed. 
Erect, smoothish, branched ; /vs. linear-lanceolate, acute; panicle leafy, 
its branches elongated; fs. innearly simple racemes; caps. rather large.—Grows 
in dry, sandy grounds, U.S. and Can. Stem 8—12’ high, often decumbent at 
base. Stem leaves, 6—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 brownish purple, cohering at apex. Cap- 
sule also rather larger than in L. major. Jn.—Sept. i 
3. L. THYMIFoLIA. Ph. Thyme-leaved Pinweed. 
Frutescent; sts. decumbent at base, hoary with appressed hairs, very 
branching and leafy; root lvs. on the short radical branches, imbricate, ellipti- 
cal, very small; cauline lvs. linear or oblanceolate, often whorled. Sea-coasts, 
Mass.! to N. J. Stem about 1f high, rigid and very bushy. Upper leaves about 
1 long, erect and crowded. Flowers in terminal and axillary clusters, on very 
short pedicels. Petals brown. Capsules globose. Jl.—Sep. 
2. HELIANTHEMUM. 
Gr. ij\cos, the sun, aySos, 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.—F//s. yellow. 
1. H. Canapense. Michx. (Cistus Canad. Sage Frost Plant. Rock Rose. 
St. ascending; branches erect, pubescent; lvs. alternate, without stipules, 
lanceolate, acute, hairy; petalzferous fls. few, large, terminal, apetalous ones late- 
ral, solitary or racemose.—In dry fields and woods, Can. to Flor. Stem about 
1f high, at length shrubby at base. Leaves 8—12” long, } as wide, entire, sub- 
sessile. Flowers with large bright yellow petals, in a terminal corymb. The 
axillary flowers later, very small, with very small petals, or apetalous. Sta-~ 
mens doclinate. Capsule smooth, shining, those of the apet. fils. not larger than 
a pin’s head. Seeds few, brown. Jn.—Sep. 
2. H. corymposum. Michx. (Heteromeris cymosa. Spach.) 
St. branching, canesceni, erect ; lvs. lance-oblong, canescently tomentose 
beneath ; fs. in crowded, fastigiate cymes, the primary ones on elongated, filiform 
pedicels, and with petals twice longer than the calyx; sep. villous-canescent, 
outer ones linear, obtuse, inner ovate, acute.—Sterile sands, N. J.toGa. Plant 
somewhat shrubby, very tomentose when young, at length diffusely branched, 
about 1f 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 exstipulate lus. 
1. H. tomentosa. Nutt. Downy Hudsonia. : 
Hoary-tomentose ; lvs. ovate, imbricate, acute, shorter than the intervals 
of the stem; fls. subsessile ; pet. obtuse —Shores of the ocean and lakes, N. J. 
to N. H.! and Wisc., &c. Plant consisting of numerous slender, ascending 
