OF ARTS AND SCIENCES. 157 



2G. Sttlosanthes viscosa, Sw. (S. glutinosa, H. B. K.) : var. 



ACUTIFOLIA. 



27. CUOTALARIA LUPULINA, DC. 



28. C^SALPiNiA Mexicana (sp. nov.) : inei'mis, glabra ; pinnis 

 3 - 4-jugis cum impari ; foliolis 4-5-jugis ; racemis plerumque simpli- 

 cibus laxis ; filamentis inferne villosis petala flava vix superantibus ; 

 ovario canescente ; legumine glabrato acinaciformi 5 - 6-spermo. — 

 Var. a. foliolis venosis. In Nueva Leon et Chihuahua, Mexico, Ber- 

 landier, no. 941, 2371, Gregg, Eaton & Edwards. Var. /3. Calipor- 

 NiCA : foliolis plerumque aveniis, coll. Rich. no. 4, & coll. Xantus. — 

 Foliola 6-9 lin., in var. Calif. 3-7 lin. longa, oblongo- vel subrotundo- 

 ovalia. Alabastra 3 lin. longa. Sepala intus sericeo-puberula. Pe- 

 tala 4-5 lin. longa, glabra, suberosa. Legumina acinaciforma vel cul- 

 triformia, plana, sesqui - bipoUicaria, in spec. Berland. magis oblonga 

 rectiuscula. — This has long been extant in several collections, but we 

 have only now, with the complete specimens of Xantus, fit materials for 

 description. 



29. Mimosa Xanti (sp.. nov.) : Eumimosa, fruticosa, cinereo-pu- 

 bescens ; ramis aculeis infrastipularibus vel sparsis rarisve armatis : 

 pinnis unijugis ; foliolis 5 - 9-jugi3 oblongis supra velutino-puberulis 

 subtus canescenti-pubescentibus et praisertim ad margines rhachique 

 strigoso-setulosis ; capitulis globosis ; bracteolis hispidis corollam qua- 

 drifidam jequantibus ; calyce parvo hyalino setoso-ciliato. — Legumen 

 ignotum. Pinnte petiolo duplo longiores. Foliola 3-4 lin. longa, in- 

 jequilatera, pennivenia, hinc nervo laterali percursa, setulis validioribus 

 incumbentibus quasi marginata. Pedunculi solitari vel bini, monoceph- 

 ali, semipollicares. — Apparently a well-marked species of the Castce 

 or Pectince subdivision, not descinbed in Bentham's monograph. 



30. Ltsiloma microphtlla, Benth. in Lond. Jour. Bot. 3, p. 83, 

 & PI. Hartw. p. 345. Legumen generis, 3-6 poll, longum, 5-8 lin. 

 latum, stipite 2-3 lin. longo. — Berlandier's no. 3144, coll. distributed 

 by Dr. Short, is a Lysiloma, in fruit, belonging to Mr. Bentham's second 

 division ; compared with Hartweg's no. 75, in flower only, it appears to 

 be the same species. Therefore the character of L. desmostachys may 

 be completed as follows : — Legumen lineari-oblongum, 6 - 7-pollicare, 

 1^-2 poll, latum, substipitatum. 



31. Calliandra Californica, Benth. Bot. Voy. Sulph. p. 14, t. 

 11. Only a fragment, depauperate, with the pinnge i-educed to a single 

 pair. Stamens bright red. 



