EUPHORBIACE^ 119 



resembling the last, but with broader leaves, is reported 

 from Canton Ziirich. E. stricta, L., resembling platy- 

 phyllos in its tuberculated capsule, but umbel only 3- 

 instead of 4-5 rayed, occurs by wood-sides; E. verru- 

 cosa, Lam., with numerous perennial stems, and yellow 

 elliptic bracts tinged with red, on dry hills; E. palus- 

 tris, L. ; stem 3-6 feet, lateral barren branches very long, 

 exceeding the umbel, in marshes ; E. dulcis, L., with 

 triangular-oval bracts, leaves denticulate towards the 

 tip, and tuberculated capsule, in woods; and E. Gerar- 

 diana, Jacq., with linear-lanceolate glaucous leaves, 

 umbel with very numerous rays, and smooth capsule, in 

 stony places. 



2. MeRCURIALIS, Tourn. 



Flowers small, usually dioecious ; sepals 3 ; stamens 8- 

 20; ovary 2-celled; leaves opposite, stipulate; not milky. 



Both the English species of Dog's-Mercury, M. perennis, 

 L., perennial, flowering in the spring; and annua, L., 

 annual, flowering in the autumn, occur also in Swit- 

 zerland. 



3. BUXUS, Tourn. 



Flowers monoecious; sepals 4-12; stamens 4; ovary 

 3-celIed; seed-vessel a woody 3-celled capsule; an ever- 

 green shrub with opposite leaves ; not milky. 



B. sempervirens, L., Box; hills on a calcareous soil; 

 Jura, Pyrenees. 



Order LXXIII.— URTICACE^. 



Flowers usually unisexual, small, green; calyx 3-8- 

 cleft ; stamens 3-8 ; ovary usually i -celled ; style i ; seed- 



