Order 17.— CISTACEiE. 245 



of England. It is well characterized by its long, trailing, leafy runners. The Ivs. 

 are truly heart-shaped. Stip. lanceolate, toothed. Ped. longer than the leaves, 

 bracted. Fls. small, fragrant. Several garden varieties are known, and distin- 

 guished by the form and color of the flowers; viz: — the purple, white and blue- 

 flowered, the double white, double purple and double blue-flowered, and tho 

 Neapolitan with pale blue flowers. Apr., May.f 



2. SOLEA, Gingins. Greent Violet. (Dedicated to W. Sole, an 

 English writer on plants.) Sepals nearly equal, not auriculato ; petals 

 unequal, the lowest 2-lobed and gibbous at base, the rest emarginato ; 

 stamens cohering, the lowest 2 bearing a gland above the middle ; 

 capsule surrounded at base by the concave torus ; seeds 6 — 8, very 

 large. — U An erect, leafy plant, with inconspicuous axillary flowers. 

 S. concolor Gingins. Green Violet. "Woods, Western 1ST. Y. to Mo., and S. to 



Car. Stem 1 — 2f high, simple, and, with the leaves, somewhat hairy. Lvs. 



4 — 6' by 1/J — 2\', lanceolate, acuminate, subentire, tapering to short petioles. 



Ped. very short, 1 — 5-flowered, axillary. Fls. small, greenish, white. CaL about 



as long as the corolla Lower petal twice larger than the others. Capsule near 



V in length. Apr., May. 



Order XVII. CISTACE^E. Rock Roses. 



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

 fls. perfect, regular, hypogynous, in one-sided racemes, very fugacious. Sep. 5, un- 

 equal, persistent. Petals 5 (sometimes 3 or wanting) convolute in aestivation. Sta. 

 mostly CO. Caps. 1-eelled, 3 — 5-valved, with as many parietal placentas, Seeds 

 albuminous. Embryo curved or spiral. (Illust. in Fig. 40-1.) 



Genera 7, species 1S5, most abundant in S. Europe and N. Africa. 



GENERA. 



T Petals 3, linear-lanceolate, small Leciiea. 1 



T Petals 5, — large and showy, or wanting Helianthemttm. 2 



— minute. Delicate shrubs IIudsoxia. 3 



i. LECHEA, L. Pinweed. (In memory of John Lcche, a Swedish 

 botanist.) Sepals, 5, the 2 outer minute ; petals 3, lanceolate, small ; 

 stamens 3 to 12 ; stigmas 3, scarcely distinct ; capsule 3-celled, 3-valved ; 

 placenta} nearly as broad as the valves, roundish, each 1 — 2-sceded. — 

 11 Often shrubby at base, with numerous very small brownish purple 

 flowers. 



1 L. major Mx. Hairy; lvs. elliptical, mucronulate ; fls. minute, about as long 

 as the pedicels. — In dry woods, U. S. and Can. St. 1 — 2f high, rigid, brittle 

 hairy, purple, somewhat corymbously branched. Lvs. of the stem about 4" 

 long, alternate, opposite, or even verticillate on the prostrate branches, crowded. 

 Fls. brownish-purple, inconspicuous among the numerous bracts. Caps, round- 

 ish, about the size of a small pin-head. Variable. J]., Aug. 



2 L. minor Lam. Smoothish ; lvs. linear, very acute ; fls. small, on pedicel which 

 are mostly twice longer. — Grows in dry, sandy grounds, U. S. and Can. Sta. 

 8 — 16' high, slender, red, paniculately branched, often decumbent at base. Stem 

 lvs. 6 — 10 by 1", alternate, revolute at the margin, those of the divergent, fili- 

 form branches gradually minute. Fls. twice as large as in L. major. Petals 

 brownish-purple, cohering at apex. Caps, the size of a large pin-head. Jn. — Sept. 



3 L. thymifolia Ph. Shrubby, hoary with oppressed hairs ; lvs. linear and linear- 

 cblanceolate, rather acute, often verticillate; fls. small, on pedicels still shorter. — 

 Seacoasts, Mass to N. J. Sts. about If high, many from the same caudex, rigid 

 and very bushy. Lvs. 6 — 10" long, erect, crowded. Fls. in terminal, densa 

 cymules, on very short pedicels. Petals brown. Caps, globous. Jl. — Sept. 



