254 Mr. J. Miers on the genus Leucophyllum. 



blackish gray, in the younger leaves of a pale yellowish white ; 

 the small branchlets are 4 to 8 inches long, almost bare, pro- 

 minently knotty at the articulation of the fallen petioles, with 

 only a few leaves towards the extremity, and with solitary flowers 

 in their axils. Bonpland describes the stamens to be didynamous, 

 quite glabrous, and the upper lobe of the corolla woolly within, 

 and the tube pilose inside to the insertion of the stamens. Kunth, 

 who probably examined very imperfect specimens, says, on the 

 contrary, that it is quite smooth within, and that it has a convex 

 palate marked with orange-coloured glandular spots, but I can 

 perceive no indication of such a palate. In the above-mentioned 

 specimens, the calycine segments are smooth within ; the corolla 

 is also smooth, and hairy only in the mouth and upon the lobes 

 of the border. Galeotti's specimen, as I have before observed, 

 has distinctly five fertile stamens, Hartweg's has only four. 



2. Leucophyllum Texanum, Benth., DC. Prodr. x. 344 ; — ramis 

 glabris, tortuosis, nodosis, subspinescentibus, junioribus to- 

 mentosis; foliis obovato-oblongis, apice rotundatis, utrinque 

 cano-tomentosis ; calyce extus tomentoso, laciniis lato lanceo- 

 latis, intus pubescentibus et 3-nerviis; corolla prsecedentis, sta- 

 minibus 4 didynamis, cum quinti rudimento, filamentis com- 

 planatis, lsevibus : capsula apice pilosa. — Mexico, Prov. Texana, 

 v. s. in herb. Hook. (Laredo, Berlandier.) 



In this species the branchlets are more glabrous, more tortuous, 

 and more knotty at the axils of the fallen leaves, often spinous 

 at the short abortive branchlets, the leaves more obovate-oblong 

 and rounded at the apex, the younger leaves incanous, not fer- 

 ruginous, the calycine segments more oblong and broader ; the 

 leaves are 7 or 8 lines long, 4 or 5 lines broad, the petiole being 

 scarcely appreciable; the calyx is 1| line in length; the corolla, 

 including the lobes of the border, is \ inch long : the calyx, 

 though persistent, does not increase in size in fruit ; the capsule 

 is small, ovate, \\ line long, the two valves being inflected at the 

 margin, very thick and coriaceous, and bifid nearly to the base. 



3. Leucophyllum campanulatum (n. sp.) ; — ramis substrictis, ra- 

 mulis abbreviatis; approximatis ; foliis ovato-orbicularibus, 

 crassis, utrinque densissime tomentosis, adultis incanis, ju- 

 nioribus confertissimis, ferrugineis; floribus axillaribus ideo 

 arctis, folio superantibus, calycis laciniis crassis, lanceolatis, 

 apice obtusiusculis ; corolla prsecedentibus dimidio majore, 

 glabra, intus simpliciter hirta, ovarii apice, stylique basi, 

 dense pilosis. — Mexico, v. s. in herb. Lindl. et Hook. (Zimapan, 

 Prov. Mex., Coulter, n. 1271). 



This species is very distinct from the two former, its leaves 



