GENUS 12. 



SPURGE FAMILY. 



467 



12. Chamaesyce humistrata (Engelm.) 

 Small. Hairy Spreading Spurge. 



Fig. 2743. 

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



386. 1856. 

 C. humistrata Small, Fl. SE. U. S. 713. 1903. 



Annual, light green, puberulent or sparingly 

 pilose. Stem branched from the base, the slender 

 branches radiately spreading, prostrate or ascend- 

 ing, 4/-I2' 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, ' long, faintly nerved, with 4 

 disk-like glands, each subtended by a narrow 

 irregular red or white appendage ; capsule de- 

 pressed-globose, less than i" 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. 455. 1753. 

 Chamaesyce maculata Small, Fl. SE. U. S. 713. 1903. 



Annual, dark green, puberulent or pilose. Stem 

 branched from the base, the branches slender, 

 radiately spreading, prostrate, 2'-is' 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, \" long, with 4 cup-shaped 

 glands, the appendages narrow, white or red, 

 crenulate ; peduncles shorter than the involucres ; 

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

 bescent ; seeds ovoid-oblong, obtusely angled, 

 minutely pitted and transversely wrinkled. 



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

 ida and Texas. California. Apparently introduced 

 west of the Rocky Mountains. Spotted or black 

 pusley. Black spurge. Spotted eyebright. Milkweed. 

 June- 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, 

 acutish, serrulate nearly to the oblique base, pale be- 

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

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

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

 brown glands, each subtended by white crenate append- 

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

 glabrous, retuse at the apex, its angles obtuse; seed 

 slightly more than \" 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. 



