ORDER 15. CISTACE^. 47 



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

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



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

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

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



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

 Perhaps this is the primary form. Abundant in Oregon. 



21 V. GRANDIFLORA 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; 

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



ORDER XV. CISTACE^E. ROCK ROSES. 



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

 leaves, with flowers perfect, regular, hypogynous. 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 parie 

 tal placentae. Seeds albuminous. EmJjryo curved or spiral. 



1 Petals 3, linear-lanceolate, small, brown-purple. Stamens 312 LKCHEA. 1 



t Petals 5, a large, yellow, very fugacious, or none. Stamens GO H KLI AXTHEMUM. 2 



a small, bright yellow. Tufted surublets. Stamens 9 30 HODSONIA. 3 



1. IiECHEA, 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. If 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 pedicel?. In dry woods. 1 2f, rigid, brittle, purple, much branched. Leaves 

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



2 I*, minor Lam. Smoothish ; leaves linear, very acute; flowers small, on pedicels 



which are mostly twice longer. Dry, sandy ground?. Stems 8 16 7 , 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 L. Novae Citsarese Austin. Hairs minute, appressed ; Ivs. ellip., 6", often opp. ; 



pan. leafy, narrow ; outer sep. lin., 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. GO. 

 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 Nos. 1, 2 



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



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



pedicellate, terminal ; apetaloti* axillary, small, clustered, snbsessile ; sepals acute ; 

 leave? revolute on the margin, lanceolate, acute. In dry soils, Can. to Va. 812'. 



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



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

 calyx ; sep. obtuse ; leaves oblong-lanceolate, margins revolute. Sanda, N. J. to Fla. If 



