168 PROCEEDINGS OF THE AMERICAN ACADEJUY 



101. Fkcelichia interrupta, Moq. ill DC. Prodr. 13, 2, p. 421. 



102. MoziNNA CANESCENS, Bentli. Bot. Voy. Sulph. p. 52, t. 25. 



103. Cnidoscolus angustidens, ToiT. Bot. Mex. Bound, p. 198. 



104. EiciNUS COM5IUNIS, Linn. Cultivated? 



105. Aphora serrata, Torr. in Bot. Mex. Bound, p. 197. 



106. Euphorbia Hindsiana, Benth. Bot. Voy. Sulph. p. 51,t. 24. 

 Without flowers or fruit. 



The following determinations and notes upon Euphorhice are com- 

 municated by Dr. Engelmann. 



107. "Euphorbia leucophtlla, Benth. Bot. Voy. Sulph. p. 50. 



less, and the separation of the fructiferous calyx from its insertion with the achenium 

 enclosed. The known species may be disposed as follows : — 



AMBLOGYNE, Raf. [Amhlogyne & San-atia, Moq.) 



§ 1. AMBLOGYNE vera. Scpala fl. foem. infcrne modice connata, fructifera 

 nrceolata- seu infundibuliformi-conniventia apice patentia. Utriculus haud seu vix 

 circumscisse dehiscens. 



1. A. POLYGONOiDES, Raf. (A. polt/gouoides & Sarratia Berlandieri, Moq. in 

 DC. Prodr. 13, p. 268, 270.) Sepala ? subspathulatolinearia, subtequalia, triner- 

 vata, nervis simplicibus. — Berlandier's specimens of no. 2276 [= 859], on which 

 Moquin founded his Sarratia Berlandieri, are very poor, and perhaps did not really 

 afford a circumscissile dehiscence. In these, and in much better specimens of the 

 same species from Bexar (Berlandier's 2411 = 981) I find the utricle to open irreg- 

 ularly or vertically near the base ; and the plant clearly belongs to A. polygonoides, 

 — The Amarantus polygonoides of Wight's Icones Ind. Or., t. 512, is no more an 

 Amhlogyne than his t. 719. The former probably represents Euxohts polygamus. 



2. A. URCEOLATA. {Amarantlius urceolatus, B*enth. Bot. Voy. Sulph. p. 158. 

 Sarratia urceolata, Moq. 1. c.) Sepala $ inajqualia, infra laminam spathulato-orbi- 

 culatam [pinnato-] nervosam (nervis ramosis viridibus) 2 cxtcriora subangustata 

 tricarinata, 3 interiora valde angustata unicarinata. — Bentham makes no mention of 

 a circumscissile dehiscence in this species, nor indeed does Moquin. 



VAt. obcordata : lamina sepalorum emarginata fere obcordata. Amhlogyne po- 

 lygonoides, Torr. in Bot. Mex. Bound, p. 170, quoad pi. coll. Wright, no. '1746. — 

 This, I suppose, is a variety of A. urceolata (which I have not seen), with the char- 

 acters of which it well accords, except that the lamina or dilated summit of the 

 sepals is strongly notched (otherwise quite entire), and nearly obcordate in shape. 

 The utricle is not circumscissile. The pinnately-veincd or nervose dilated lamina, 

 and the great contraction below of three of the sepals, at once distinguish this from 

 A- polygonoides. 



§ 2. SARRATIA. (Sarratia, Moq. pro parte.) Sepala fl. foem. basi tantum con- 

 nata, fructifera pi. m. patentia. Utriculus circumscisse dehiscens. — Caules erecti. 



3. A. fimbriata (Sarratia Berlandieri, yas.Jimhriata, Torr. 1. c.) : caule ramis- 

 que virgatis ; foliis lineari-lanceolatis ; glomerulis globosis in axlllis foliorum sessi- 

 libus et superne in spicam subaphyllam congestis seu approximatis ; bractcis calyce 



