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112 UNITED STATES AND MEXICAN BOUNDARY. 



Pentstemon linarioides (sp. noY.) : sufifrnticosusj pube mimitissima glauco-cinereus, mul- 

 ticaulis ; caulibus floridis simplicibus foliosis strictis (6-15-pollicaribus); foliis angustissime 

 linearibus sen lineari-acerosis imisve spatulato-linearibus mucronatis integerrimis ; racemo vel 

 paniculo virgato laxifloro ; peclunculis alternis brevibus 1-5-floris ; calycis segmentis ovatis vel 

 ovato-lanceolatis acuminatis infernescarioso-marginatis; corolla pallide ca3ruieo-purpureasuperne 

 ampliata breviter bilabiata^ palate pi. m. barbatOj lobis rotundatis subconformibus patentibus ; 

 antlieris glabris subexsertis ; filamento sterili longitudinaliter barbate. — Organ mountains ; 



P 



New Mexico 



(1472 



Bigelow. Sierra San Luis^ Chibuabua and Sonora ; Scliott. A well marlced species, of the group 

 to wliicli tbe preceding belongs ; the numerous flowering stems form a woody base ; the foliage 

 and inflorescence resembling one of the strict and narrow-leaved Linarias. Corolla 7 to 9 lines 

 long. 



Pentstemon Jamesii {BentJi. in DC. Frodr. 10,^. 325): pumilus, strictus, puberulus ; foliis 

 nunc glabratis omnibus sessilibus pleri8c[ue parce denticulatis, caulinis floralibusque linearibus, 

 imis et radicalibus sublanceolatis deorsum attenuatis; racemo 8-12-floro spicato ; pedunculis 

 alternis 1-2-floris seu Dedicellis brevissimis 



cum 



viscido-pubentibus ; corolla (pallide purpurea) tubo angusto, fauce subito valde ampliata cam- 

 panulata^ lobis conformibus rotundatis ; antheris glabris ; filamento sterili longitudinaliter 



barbato. — Low places near the Limpio, July; Bigeloio. This species may be described as inter- 

 mediate between P. Coba}a and P. pumilus^ Nutt. The specimens are only 5 or 6 inches high, 



herbaceous, erect, leafy ; the leaves from 1| to 2\ inches long, and 1| to 2\ lines wide, thickish; 



the upper floral linear-subulate and not exceeding the calyx ; the latter is half an inch long ; 

 the corolla, which has just the shape of that of P. Cobsea, is over an inch long. It is somewhat 

 viscid externally and slightly bearded within the lower lip. Sterile stamen like that of P. 

 Coba^a, but the beard denser. 



Pentstemox stenophtllus (sp. nov.): glaberrimus ; caule gracili 2-3-pedali ; foliis linearibus 



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elongatis integerrimis, floralibus lineari-setaceis ; panicula laxiflora ; pedunculis oppositis 

 patentibus gracilibus 2-5-floris pedicellis 2-4-plo longioribus; calyce parce glanduloso-pubero, 

 segmentis ovatis margine scariosis ciliato-denticulatis acuminatis, acumine patente; corolla 

 infundibulifor mi- ampliata (fere sesc[uipollicari cn3rulea?) vix bilabiata^ lobis brevibus conformibus 

 rotundatis; antheris rima hirto-ciliolatis ; filamento sterili glaberrimo summo apice dilatato. 

 Hills between Babacomori and Santa Cruz, Sonora ; Wright^ (14Y7-) Radical leaves not seen: 

 cauline all alike, but gradually smaller and narrower towards the summit of the virgate stem, 

 the larger 4 inches long and \\ or 2 lines wide, perfectly entire. Peduncles 1^ or 2 inches long. 

 Pedicels 3 to 6 lines long. Calyx 2 or 3 lines long. This species belongs to the section Cepo- 

 cosmusy and to the same group with P. imberbis. If, as seems likely, No. 186 of the collection 

 of Wi8lizenus,'from Cosiquiriachi, belongs here, the corolla is blue. 



Pentstemon DASiTHYLLUS (sp. nov.) I velutino-puberulus ; caulibus e basi sufiructicosa strictis ; 

 foliis lineari-lanceolatis imisve oblanceolatis integerrimis obtusis junioribus pra^sertim molliter 

 velutinisj floralibus gradatim minoribus cum racemo simplici laxo paucifloro glanduloso-puber- 

 ulentis ; pedicellis alternis; sepalis ovato-oblongis obtusis; corolla (^'purpureo-cserulea'' fere 

 sesquipollicari) ampliato-infundibuliformi vix bilabiata, lobis rotundatis subconformibus ; an- 

 theris rima ciliolato-hirtellis ; filamento sterili glaberrimo apice vix dilatato. — Stony hills of the 

 Pecos, and Cook's Spring, New Mexico; Wright y (1478). Valley of the Santa Cruz river on moun- 

 tain sides, and in the valley of the San Pedro, Sonora; Capt.E. E. Smithy BigeloiadcThurher. Also 



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