﻿PLANTS OF THE TRES MARIAS ISLANDS. 



89 



haviug the styles bifurcate, to the middle only, and flat- spreading with 

 no tendency to reflexion or peltation as in the other species. The 

 fruits may prove this to be a distinct species. May 3 to 25, 1897 (Nos. 

 4298 and 4202)."— Millspaugh MSS. 



Euphorbia sp. 



Specimens are indeterminable from lack of characters. May 3 to 25, 

 1897 (No. 4215). 



Euphorbia nelsoni Millspaugh. 



Euphorlna nelsoni Millspaugh, Bot. Gaz. 26:268. 1898. 

 May 3 to 25, 1897 (No. 4294, not 4284, as published). 



Fig. 2.— Euphorbia nelsoni. 



The original description is as follows: ^'Fruticosa, glabra, longe et 

 corymbosa ramosa, ramis teretis, internodiis longis, cortex maculatis, 

 maculic oblongis roseus. Foliis inferioris fasciculatis, petioliis longis 

 filamentosis, pagina tenuis ovato-cuneatis, obtusis, apiculatis, foliis 

 floralibus oppositis, orbiculatis i)etiolis limbum jequantis. Involucriis 

 terminalibus corymbosis, pedunculatis, campanulatis glabris, lobis latis 

 truncatis irregulariter 6-8 fimbriatis, glandulis 5, transversis oblongis 

 integris, appendicibus minutis vel null us. Stylis longis revoluto-cir- 

 ciiialis. Oapsul?e luridiie profunde tri-sulcatiie, semine sub-globosis 

 pallide-fuscis, scrobiculatis, linea media nigra geminatis, rugic anasto- 

 mosantis tuberculatis 2 mm. long, 1.9 mm. lat." 



Several Euphorbias were collected on the islands in too imperfect 

 condition to determine, and it has been thought advisable to reproduce 

 the cut^ of the present species for the purpose of assisting future study 

 of the flora. 



1 Through the kindness of the editors of the Botanical Gazette I am permitted to 

 use this illustration. 



