CtSTINE^E. 35 



HAB. Sandy places. N. S. and Can. W. to Miss. June. !. 

 Stem 8 12 inches high. Flowers purple and yellow. Whole 

 plant more or less viscid and fetid.. 



ORDER XIV. CISTINE7E. De Cand. Lind. 



Sepals 5, persistent, unequal, the three inner with a twisted 

 aestivation. Petals 5, hypogynous, very fugitive, crumpled 

 in estivation and twisted in a direction contrary to that of the 

 sepals. Stamens indefinite, hypogynous, free ; anthers in- 

 nate ; stigma simple. Ovary distinct, 1 or many celled ; 

 style single. Fruit capsular, usually 3-5-10-valved, either 

 1-celled with parietal placentae in the axis of the valves, or 

 imperfectly 5 or 10-celled with dissepiments proceeding from 

 the middle of the valves, and touching each other in the 

 centre. Seeds indefinite in number. Embryo inverted, either 

 spiral or curved in the midst of mealy albumen. 



Shrubs or herbs. Leaves usually entire, opposite or alter- 

 nate. Flowers very fugacious. 



1. HELIANTHEMUM. Tourn. 



Calyx with 3 equal sepals, or 5 disposed in two rows, the 

 two outer ones often smaller, rarely larger. Petals 5, often 

 irregularly denticulate at the apex. Stigma capitate. Ova' 

 ry triquetrous. Capsule 3-valved, with the dissepiment in the 

 middle of the valves. Seeds angled, smooth. 



Polyandria. Monogynia. 



* Peduncles one-flowered. 



1. H. canadense Mich.: stem ascending; branches erect, hirsute; 

 leaves oblong-lanceolate, acute, hirsute, paler beneath ; peduncles soli- 

 tary, 1-flowered ; sepals broad-ovate, acuminate ; capsule shorter than 

 the calyx. 



HAB. Margins of woods. Can. to Car. June. I{. Stem a 

 foot high. Racemes few-flowered, generally terminal. Flowers 

 yellow, large. Rock Rose. Frost Weed. 



2. H. ramuliflorum Mich. : stem erect, pulverulent-pilose, branching, 

 subdichotomous at the apex ; branches virgate, flower-bearing ; leaves 

 lanceolate-elliptic or oblong, acute, margin scarcely revolute, white 

 tomentose beneath ; flowers peduncled, solitary ; sepals broad-ovate, 

 acuminate ; capsule globose, of the length of the calyx. 



HAB. Fields. N. J. to Car. If. July. Stem a foot high. 

 Flowers yellow, small. Calyx and peduncles pilose. Style very 

 short. 



