92 PROCEEDINGS OF THE AMERICAN ACADEMY 



S. Arizona, in Cave Cuiion, near Fort Iluachuca, Lemmon. Resem- 

 bles M. solanaceus, but with somewhat different habit, and with corolla 

 so little urceolate that, if this species only were regarded, it would 

 hardly be geuerically separated from Pltysalis. P. minutijiora, taken 

 up by Dunal from Mo(;ino and Sesse's drawings (but accidentally 

 omitted from the Caiques des Dessins), may be the same ; but the 

 " foliis repandis " would apply better to M. solanaceus, the " pruiuo- 

 sis " to neither. 



Scrophulariacece. 



Pentstemon rubescens. p. dasyphyllo nimium affinis, minutis- 

 sime pruiuoso-puberulus ; foliis angustissime liiiearibus glabratis ; 

 thyrso aperto, ramis jiatentibus saipius trifloris ; sepalis ovatis ple- 

 rumque subito acuminatis glanduloso-puberulis ; corolla sesquipollicari 

 (ut videtur incarnata) e tubo brevi ventricoso-ampliata, lobis brevibus 

 latis consimilibus, vel antico paullo longiore ; antherarum loculis (ut 

 in P. dasyphyllo) turgido-ovatis, valvulis ciliato-denticulatis. — S. Ari- 

 zona, near Fort Huachuca, in Tanner's Caiiou, Lemmon. 



Pentstemon CiESius. Saccanthera, inter P. gracilentem et P. 

 Roezli, subpedalis e basi parum lignescente ; foliis coriaceis glaucis 

 integerrimis subeveniis, plerisque rotundis (semipoUicaribus) in peti- 

 olum ttquiloiigum marginatum subito decurrentibus, superioribus paucis 

 spathulatis vel sublanceolatis sessilibus ; thyrso laxifloro ; sepalis ob- 

 longis pcdicellis pedunculisque pruinoso-glandulosis ; corolla (fere |- 

 pollicari) tubulosa sursum parum ampliata purpurea seu violacea, 

 limbo brevi intus glabro ; filamento sterili filiformi glaberrimo. — S. 

 E. California, on rocks in the San Bernardino Mountains, coll. Parry 

 & Lemmon (1876, no. 304), W. G. Wright, 1880, S. B. & W. F. 

 Parish, 1880 and 1882. A well-marked species, of which the ma- 

 terials were until now scanty. It has probably been somewhat 

 distributed, as a form of P. Icetus or of P. Roezli, from which it 

 widely differs both in the foliage, the glaucous hue, and the narrow 



corolla. 



BucHNERA piLOSA, Benth., var. Arizonica. Forma hispidula, 

 nunc paniculato-ramosa. — Southern Arizona near Fort Iluachuca, 

 Lemmon 1882. A form of the commonest and the most variable 

 Mexican species.* 



* The American species north of the Istlimus have never been well deter- 

 mined. Tlie subjoined memoranda may contribute in some degree to a better 

 understanding of tliem. 



