ORDER lo. CISTACE^E. 47 



19V. ODORATA L. Sweet, or English Violet. Neapolitan. Stolons creeping ; lv?. cor- 

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



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

 ovate, lower ones ovate cordate, deeply creuate ; stipules as large as the leaves ; spur 

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



/3. arrJnxtx. Slender, subsimple ; petals scarcely longer than sepals. Fields. 

 Perhaps this is the primary form. Abundant in Oregon. 



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

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



22 V. CORNUTA. 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. BOCK ROSES. 



Herbs or low shrubs with simple, entire, opposite (at least the lower) 

 leaves, \f\\h flowers perfect, regular, hypogynottt, in one-sided racemes, very 

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

 ing), convolute in bud. Capsules 1-celled, 3-5-valved, with as many pane 

 tal placentae. Seeds albuminous. Embi^yo curved or spiral. 



1! Petals 3, linear-lanceolate, small, brown-purple. Stamens 3 12 LKCHKA. 1 



^ Petals 5, large, yellow, very fugacious, or none. Stamens QO HKLIANTHKMUM. 2 



ft small, bright yellow. Tufted shrublets. Stamens 9 30 HUDSOJCIA. 3 



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

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

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

 at base, with numerous very small brownish purple flowers. 



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



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

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



2 It* minor Lam. Stnoothish ; leaves linear, very acute ; flowers small, on pedicels 



which are mostly twice longer. Dry, sandy grounds. Stems 8 16', slender, red. 

 Leaves 61 0". Capsules the size of a large pin-head. Summer. 



3 L. tliymifolia Ph. Shrubby; hoary with appressed hairs ; leaves linear and lin- 



ear-oblanceolate, rather acute, often verticillate ; flowers small, on pedicels still 

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



4 Ij. Novae Csesareae Austin. Hairs minute, appressed; Ivs. ellip.. 6", often opp. ; 



pan. leafy, narrow ; outer sep. liu., longer than the fl. 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 apetalous. 



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



Flowers all alike, pentepetalous and polyandrous Nos. 3, 4 



1 H. Caiiadense MX. Frost Plant. Hoary pubescent ; petaliferous flowers solitary, 



pedicellate, terminal ; apetalous axillary, small, clustered, subeessile ; sepals acute ; 

 leaves revolute on the margin, lanceolate, acute. In dry soils, Can. to Va. 8 12'. 



2 H. corymbosmn MX. Canescently tomentous; fls. in crowded, fastigiate cymes, 



the primary ones on elongXved, filiform pedicels, and with petals twice longer than the 

 calyx ; sep. obtuse ; leaves oblong-lanceolate, margins revolute. Sands, N. J. toPla. If 



