Euphorbia 



EUPHORBIACEAE 



Euphorbia 



annual, 5-40 cm. high: glands of the cyathium oval to 

 oblong, short stipitate: capsule smooth; seeds brown, 

 oval, sharply reticulate-pitted, 2 mm. long, with large 



yellow caruncle 



dd. Lvs. and bracts of the main umbel oblong, lanceolate or 

 linear, margins entire. 

 e. Glands of the cyathium oval, recurved, up to 2 mm. 

 long: bracts of the smaller units of the infl. in 

 3's, broadly ovate to almost orbicular, with prominent 

 midrib: ovary and capsule coarsely glandular- 

 verrucose: seeds smooth, light brown, ovoid to 

 almost globular, about 2 mm. in diam.: perennial 



herb, 5-10 dm. high 9- 



ee. Glands of the cyathium curved, lunate and 2-horned or 

 crescent-shaped with long slendei points: bracts of 

 the smaller units of the infl. in pairs, sometimes 

 unequal, reniform or triangular-lanceolate. 

 Upper bracts of the infl. reniform, often overlapping: 

 glands of the cyathium lunate and 2-horned: peren- 

 nial herbs, 5-40 cm. high, from elongated rhizomes. 

 Leaf-like bracts of the terminal umbel not abruptly 

 dilated at the base; intermediate bracts of the 

 compound umbel, when present, similar to the 

 ultimate ones: capsule warty; seeds ellipsoid- 

 ovoid, smooth, about 2 mm. long, with yellow 



emarginate caruncle 10- 



Leaf-like bracts of the terminal umbel abruptly 

 dilated at the base; intermediate bracts of the 

 compound umbel reniform, bifid, unequal, 2- 

 tadiate: capsule smooth or nearly so 11. 



Upper bracts of the infl. deltoid or triangular- 

 lanceolate: glands of the cyathium dark red, 

 curved, 2-horned: capsule smooth; seeds smooth; 

 caruncle small and depressed: stout perennial, 

 20-50 cm. high, from a tough fibrous turbinate 

 caudex 12. 



8. E. helioscopia 



E. pekinensis 



E. esula 



E. lunulata var. 

 souchouensis 



E. kansuensis 



6. 



Euphorbia humifusa Willd. *&£&:£ (Ti Chin Ts'ao; Embroidered-carpet Herb) 

 (Hegi5(l):144). Prostrate herb; fls. VI-VII; fr. VII-IX. Northern Eurasia; locally 

 in Ku. Field and garden weed. 



Euphorbia thymifolia Linn. (G.H.C. 136:252). Prostrate annual; fls. VII-VIII; 

 fr. VIII-IX. All tropical countries; locally in Ki. Sandy waste land. 

 Euphorbia hirta Linn. (M.F. 283). Erect or decumbent annual; fls. VII-VIII; 

 fr. VIII-IX. All tropical countries; locally in Ki. Sandy banks. 

 Euphorbia milii Ch. des Moulins (E. splendens Bojer ex Hook.) Crown-of-Thorns 

 m^M (Pa Wang Pien; The-Great-King's-whip) (B.M. 617). Shrub, to 1.5 m.; fls. 

 red, V. Introduced from Madagascar; locally in Ku. Planted, ornamental. 

 Euphorbia marginata Pursh (B.M. 618). Stout annual, 3 dm. high; fls. VIII. 

 Introduced from North America; locally in Ku. Planted, ornamental. 

 Euphorbia pulcherrima Willd. ex Klotzsch Poinsettia — n H n £C (I P'in Hung; First- 

 rank-red) (B.M. 618). Shrub, to 3 m.; fls. XII-I. Introduced from tropical Ame- 

 rica; locally in Ku. Planted, ornamental. 



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