EUPHORBIACE^. 



141 



Stephaiiopndium 

 Eiigkri. 



J)iclHi2>etaUtm Iiinpidtim. 



Close beside Dichapctalinn are placed two genera very closely allied 

 to it: Sfej)/ianoj)oditmi^ (&g. 22Q), distinguished principally by the 

 petals being united, sometimes for a very great 

 distance in a gamopetalous corolla bearing the sta- 

 mens; and Tapurcr (fig. 227 

 -229), also having a gamo- 

 petalous corolla, biit irre- 

 gular, imbricated and with 

 fertile stamens, generally 

 fewer, more rarely equal in 

 number to the divisions of 

 the corolla.'^ The disk is 

 unilateral. The two last 

 have alternate 



Fig. 22.5. Longitudinal section 

 of flower (■§). 



genera 



leaves, and the flowers in Section of'flower^S^' 

 glomerules, drawn up as far 

 as the summit of the petiole. The fii'st has only American species, 



Tapura giilaninsis. 



Fig. 227. Flower {\) 



Fig. 228. Diagram. 



Fig. 229. Longitudinal 

 section of flower. 



at present four in number ; "'■ the latter is represented by a species 



I PiEiT. ct ExDL. Nov. Qen. et Spec. iii. 40. t. 

 246.— B. n. Gcii. 341, n. 2.— H. Bn. in P<i!/e>- 

 Fam. Kat. 308. 



3 AuBL. Giiian. 12C, t. 48.— J. Gat. 419.— 

 PoiR. Suppl. vii. .587 ; III. t. 122.— DC. Pndr. 

 ii. 58.— K.NDL. Gen. n. o"o9.— B. II. Gen. 341, 

 995, n. 3.— H. Bn. in Ptnier Fam. Nat. 308; in 

 Adansonia, xi. 110, — Rohria Schkeu. Gten. 30 

 (nee Vahl). 



' This has only been seen at jiresent in one 

 American species, T. capiiulifera, the type of our 



section Dischizulann. The mciostemonous spe- 

 cies have u.sually three fertile stamens, alternate 

 mth the two large double-headed petals ; the 

 others arc sterile. The plane of symmetrj'Jpass- 

 ing by the middle of sepal 2 and in the] inter- 

 vals f sepals 1 and 3, cuts at an angle of 1/lOth 

 of the circumference the piano of symmetry of 

 the corolla (fig. 228), the androceum and the 

 gyn.fceum. (See Adannoiiia, xi. Ill, 112). 



■• Wali-. Hep. ii. 828; v. 408.— H. B.n. in 

 Adniisotiia,Ti\. 109, t. 9. 



