CISTACEiE. 57 HELIANTHEMUM. 



ORDER XX. CISTACEtE. 



Cal. — Sepals 5, unequal, the 3 inner with a twisted aestivation. 

 Cor. — Petals 5, hypogynous, very fugitive, crumpled in scstivation. 

 Ifta. — Indefinite, hypogynous, distinct. Anthers innate. 

 Ova. — Distinct, or many-celled. Style single. Stigma simple. 



Fr. — Capsular, either ] -celled with parietal placentre, or imperfectly 3 — 5-celled, with dis- 

 sepiments proceeding from the middle of tlie valves. 

 A small order of herbs or low shrubs, found most abundantly in the North of Africa or 

 South of Europe. They possess no interest on account of their properties. 



Petals 3, lanceolate, » Lechea. 1 



p 1 . <;. I Calyx. 3 equal sepals, or 5 in two rows, 2 outer smaller, Hdianthemum- 2 



i. etals o; J Cj^ij,^ 5 parted, segments unequal, the 2 outer minute. Hudsonia. 3 



1. LE'CHEA. 



Calyx three sepaled, inferior; corolla three petaled, petals 

 linear; capsule 3 celled, 3-valved, with 3 smaller valves with- 

 in ; sti^jmas 3, plunnose ; seed one. 



Name In memory of C Lecheo, a Swede, professor of natural history at 

 Abo, and a botanic author. 



1. L. MAJOR. 



Erect, hairy ; haves oblong-lanceolate ; foicers in fascicled racemes, one 

 sided on short pedicels; stem from one to two feet high, rigid, brittle, hairy, 

 purple; leaves downy, whitisli underneath ; flmvcrs small, obscure, in dense, 

 terminal and lateral bunches; cupsides roundish, of the size of a large pin's 

 bead. Dry woods. Jl. Aug. Per. Large Pin-weed. 



2. L. MINOR. 



Smoothish ; leaves linear-lanceolate, acute; panicle leafy, its branches elon- 

 gated, flowering on all its parts. Stems about 8 inches high, slender, with 

 numerous, simple, expanding branches and narrow leaves ; flowers minute ; 

 capsule not longer than a pin's head, round. Grows in dry sandy grounds. 

 Jl. Auo-. Per. Small Pin-weed. 



3. L. thymifo'lia. p. 



Frutescent ; stems decumbent at base, densely branched, hoary with appies- 

 sed hairs, and very leafy ; root leaves on tlie short radical branches, imbricated, 

 elliptical, very smill ; cauline leaves linear or oblanceolate, often whorled. 

 Flowers in terminal and axillary racemes, on very short pedicels. Stem 

 about a foot high, rigid and very bush}'. Sea coast. Jl. — Sept. Per. 



Tkyme-leuvcd Pin-weed. 



2. PI E L I A' N T H E M U M . 



Calyx 5-leavcd; exterior leaflets smaller; petals 5 ; capsule 

 superior, 1-celled, 3-valvcd, opening at top; seeds angular. 



Gr. ^Xioi, the sun, and a-v9oi. a flower; in allusion to the bright golden 

 radiance of the blossoms. Cal. of 5 roundisli, concave leaves. Pet. roundish, 

 flat, spreading. Slam, numerous, shorter than cor. Style long as stamens. 

 A genus separated from Cistus. 



H. CaNADE'NSE. M. Cistus Canadensis. L. 



Without stipules, erect, hairy ; leaves linear-lanceolate, erect, flat, paler 

 beneath; raceme terminal, few-flowered; capsule shorter than the calyx. 



