Petals 5, crumpled in the bud, fugacious. Styles short or none in our species; stigma 3-lobed. Capsule strictly 1-celled. Embryo curved in the form of a hook or ring.--Flowers in most N. American species of two sorts, viz., _primary_ or earlier ones, with large petals, indefinitely numerous stamens and many-seeded pods; and _secondary_, or later ones, which are much smaller and in clusters, with small petals or none, 3--10 stamens, and much smaller 3--few-seeded pods. The yellow flowers open only once, in sunshine, and cast their petals by the next day. (Name from ἥλιος, _the sun_, and ἄνθεμον, _flower_.) 1. H. Canadénse, Michx. (FROST-WEED.) _Petal-bearing flowers solitary; the small secondary flowers clustered in the axils of the leaves_, nearly sessile; calyx of the large flowers hairy-pubescent, of the small ones hoary, like the stem and lower side of the lanceolate-oblong leaves.--Sandy or gravelly dry soil, Maine to Minn. and southward. June--Aug.--Stems at first simple. Corolla of the large flowers 1´ wide, producing pods 3´´ long; pods of the smaller flowers not larger than a pin's head. A variety is more hoary, and with a stronger tendency to multiply the minute clustered flowers. Late in autumn crystals of ice shoot from the cracked bark at the root, whence the popular name. 2. H. corymbòsum, Michx. _Flowers all clustered at the summit_ of the stem or branches, the petal-bearing ones at length on slender stalks; calyx woolly.--Pine barrens, N. J. and southward along the coast. 2. HUDSÒNIA, L. Petals 5, fugacious (lasting but a day), much larger than the calyx. Stamens 9--30. Style long and slender; stigma minute. Pod oblong, enclosed in the calyx, strictly 1-celled, with 1 or 2 seeds attached near the base of each nerve-like placenta. Embryo coiled into the form of a closed hook.--Bushy heath-like little shrubs (seldom a foot high), covered all over with the small awl-shaped or scale-like alternate persistent downy leaves, producing numerous (small but showy) bright yellow flowers crowded along the upper part of the branches. (Named in honor of _Wm. Hudson_, an early English botanist.) 1. H. ericoìdes, L. Downy but greenish; leaves slender, awl-shaped, loose; flowers on slender naked stalks; ovary hairy.--Dry sandy soil near the coast, E. Maine to Va.; N. Conway, N. H. (_Miss Minns._) May. 2. H. tomentòsa, Nutt. Hoary with down; leaves oval or narrowly oblong, 1´´ long, close-pressed and imbricated; flowers sessile or some short-peduncled.--Sandy shores, Maine to Md., and along the Great Lakes to Minn.; rarely on banks of streams inland. May, June. 3. LÉCHEA, Kalm. PINWEED.