Genus 12. 



SPURGE FAMILY. 



467 



12. Chamaesyce humistrata (Engelm.) 



Small. Hairy Spreading Spurge. 



Fig. 2743. 



Euphorbia humistrala Engelm.; A. Gray, Man. Ed. 2, 



386. 1856. 

 C. humistrata Small, Fl. SE. U. S. /'J- I903- 



,\niiu.il, light green, puberulent or sparingly 

 pilose. Stem branched from the base, the slender 

 branches radiately spreading, prostrate or ascend- 

 ing, 4-12' long; leaves ovate-oblong or obovate- 

 oblong, or sometimes narrower, 2"-7" long, ser- 

 rulate, at least above the middle, oblique, obtuse 

 or subcordate at the base, short -petioled ; stipules 

 at length fringed ; involucres in lateral clusters, 

 split on one side, i" long, faintly nerved, with 4 

 disk-like glands, each subtended by a narrow 

 irregular red or white appendage ; capsule de- 

 pressed-globose, less than l" in diameter, its 3 

 lobes keeled; seeds oblong, *" long, papillose, 

 obscurely transversely wrinkled. 



Ontario to New York, New Jersey, Minnesota, 

 Kansas and Mississippi. Spotted eyebright. Aug.- 

 Oct. 



13. Chamaesyce maculata (L.) Small. 



Milk Purslane. Spotted or Blotched 



Spurge. Fig. 2744. 



Euphorbia maculata L. Sp. PI. 45S- '75.!. 

 Chamaesyce maculata Small, Fl. SE. U. S. 713. igoj- 



Annual, dark green, puberulent or pilose. Stem 

 branched from the base, the branches slender, 

 radiately spreading, prostrate, 2'-i5' long, often 

 dark red ; leaves usually blotched, oblong or 

 ovate-oblong, 2"-8" long, obtuse, more or less 

 serrate, short-petioled, the base oblique, subcor- 

 date; stipules a fringe of setae; involucres soli- 

 tary in the axils, entire, i" long, with 4 cup-shaped 

 glands, the appendages narrow, white or red, 

 crenulate; peduncles shorter than the involucres; 

 capsule ovoid-globose, about l" in diameter, pu- 

 bescent ; seeds ovoid-oblong, obtusely angled, 

 minutely pitted and transversely wrinkled. 



Dry soil. New England to Ontario, Wyoming, Flor- 

 ida and Te.xas. California. Apparently introduced 

 west of the Rocky Mountains. Spotted or black 

 pusley. Black spurge. Spotted eyebright. Milkweed. 

 Tune-Nov. 



14. Chamaesyce Rafinesqui (Greene) Small. 

 Hairy Spurge. Fig. 2745. 



E. hypericifolia var. hirsuta Torr. Fl. N. & Mid. St. 331. 

 1826. Not E, hirsuta Schur, 1853. 



Euphorbia hirsuta Wiegand, Bot. Gaz. 24: 51. 1897. 



Euphorbia Rafinesqui Greene, Pittonia 3; 207. 1897. 



.Annual, more or less hirsute. Stems branched at the 

 base, the branches prostrate or decumbent, 2'-io' long, 

 dichotomous. zigzag; leaves ovate-oblong, 4"-8" long, 

 acntish. serrulate nearly to the oblique base, pale be- 

 neath; petioles about h" long; stipules lacerate; pedun- 

 cles surpassing the petioles; involucres funnel-form, i" 

 high, glabrous, bearing 4 stalked saucer-shaped dark- 

 brown glands, each subtended by while crenate append- 

 ages; capsule about i" in diameter, broader than long, 

 glabrous, retuse at the ape.x, its angles obtuse ; seed 

 slightly more than i" long, 4-angled, black with a white 

 coating, its faces even or slightly wrinkled. 



In sandy or gravelly soil, Quebec and Ontario to Con- 

 necticut, New Jersey, Pennsylvania and Illinois. June-Sept. 



