OKDER 15. CISTACE^E. 47 



I'J V. ODOKATA L. Sweet, or English Violet. Neapolitan. Stolons creeping; 1 vs. cor 

 date, crenate. nearly smooth ; sep. obtuse. Ear. Flowers fragrant, blue, white, &c. 



20 V. tricolor L. Pansey, Heartsease. St. angular, diffusely branched; 1 vs. oblong- 

 ovate, lower one? ovate cordate, deeply crenate ; stipules as large as the leaves ; spur 

 short, thick. Garden?. Flowers large, white-yellow-violet to black, in endless variety. 



ft. ari-SnsiH. Slender, subsimple ; petals scarcely longer than sepals. Fields. 

 Perhaps this is the primary form. Abundant in Oregon. 



21 V. GKANUIFLORA L. Stem 3-cornered, procumbent; leaves crenate, shorter than 

 the peduncles, much larger than the stipules ; dowers large, all violet. 



82 V. COBNUT A. Stems 3-cornered, ascending ; Ivs. cordate, crenate ; stip. cut-toothed ; 

 fls. violet-purp., the spur subulate, longer than the sepals. From the Pyrenees. Hardy. 



ORDER XV. CISTACE^E. ROCK ROSES. 



Herbs or low *hrubn with simple, entire, opposite (at least the lower/ 

 leaves, wltii flowers perfect, regular, hypogynous, in one-sided racemes, very 

 fugacious. Sepal* 5, unequal, persistent. Petals 5 (sometimes 3 or want 

 ing), convolute in bud. Capsules 1-cell^d, 3-5-valved, with as many parif 

 tal placentae. Seed* albuminous. Embryo curved or spiral. 



*. Petals 3. linear-lanceolate, small, brown-purple. Stamens 3 12 LKCUEA. 1 



1 I'eta!s5, larjre, yellow, very fugacious, or none. Stamens OO HKLIANTHKMUM. 2 



ii small, bright yellow. Tufted shrublets. Stamens 9 30 HUDSOWIA. 3 



1. LECHEA, L. PINWEED. Sep. 5, the 2 outer minute. Pet. 3, lan- 

 ceolate, small. Stig. 3, scarcely distinct. Caps. 3-cclled, 3-valved, placentae 

 nearly as broad as the valves, roundish, each 1-2-seeded. If. Often shrubby 

 at base, with numerous very small brownish purple flowers. 



1 L. major MX. Hairy ; leaves elliptical, mucronulate ; flowers minute, about as lon 



as the pedicels. In dry woods. 1 2f, rigid, brittle, purple, much branched. Leaves 

 4". Capsules the size of a small pin-head. July, August. 



2 Ij. minor Lam. Stuoothish; leaves linear, very acute; flowers small, on pedicels 



which are mostly twice longer. Dry, sandy grounds. Stems 8 10', slender, red. 

 Leaves 6 10". Capsules the size of a large pin-head. Summer. 



3 L. thymifolia. Ph. Shrubby; hoary with approved hairs : leaves linear and liu- 



ear-oblanceolate, rather acute, often verticil! He. : flowers small, on pedicels still 

 shorter. Coasts. Mass, to N. J. If. Very bushy. Capsules size of a pin-head. Sum. 



4 I... Novae Caesare Austin. Hairs minute, appressed ; Ivs. ellip., 6", often opp. ; 



pan. leafy, narrow ; outer sep. liu., longer than the li. or pedicels. N. J. (Prof. Porter). 



2. HELIANTHEMUM, L. ROCK ROSE. Sep. 5, the 2 outer smaller. 

 Pet. 5, or rarely 3, convolute contrary to the sepals, sometimes 0. Stam. oo. 

 Stig. 3, scarcely distinct. Capsules triangular, 3-valved, opening at top. 

 Sds. angular. Fls. yellow, often of 2 kinds, the later ones being apetalnus. 



% Flowers of 2 sorts, the later ones apetalous, and 3-10-androus Nos. 1 ! 



Flowers all alike, peiitepetalous and polyandrous No*. 3. 4 



1 H. Canadense MX. Frost Plant. Hoary pubescent ; petalifrrous flowers solitary, 



pedicellate, terminal ; apetalous axillary, small, clustered, subsessile ; sepals acute: 

 leaves revolure on the margin, lanceolate, acute. In dry soils, Can. to Va. 812'. 



2 H. corymbosum MX. Canesceutly tomeutous ; fls. in crowded, fastigiate cymes, 



the primary ones on eiong^ed, filiform pedicels, and with petals twice longer than the 

 calyx ; sep. obtuse ; leaves oblong-lanceolate, margins revolute. Sands. N. J. toFla. I/ 



