£ 
hec, 2 
TJ 
112 UNITED STATES AND MEXICAN BOUNDARY. 
PENTSTEMON LINARIOIDES (sp. nov.): suffruticosus, pube minutissima glauco-cinereus, mul- 
ticaulis; caulibus floridis simplicibus foliosis strictis (6—15-pollicaribus); foliis angustissime 
linearibus seu lineari-acerosis imisve spatulato-linearibus mucronatis integerrimis ; racemo vel 
paniculo virgato laxifloro ; pedunculis alternis brevibus 1—5-floris ; calycis segmentis ovatis vel 
ovato-lanceolatis acuminatis infernescarioso-marginatis; corolla pallide czeruleo-purpurea superne 
ampliata breviter bilabiata, palato pl. m. barbato, lobis rotundatis subconformibus patentibus; 
antheris glabris subexsertis; filamento sterili longitudinaliter barbato.— Organ mountains ; 
Parry. Copper Mines and Los Animos, New Mexico; Wright, (1472.) Thurber, (331, 1115,) 
Bigelow. Sierra San Luis, Chihuahua and Sonora; Schott. А well marked species, of the group 
to which the 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. 
Prntstemon Jawrsm (Benth. in DC. Prodr. ‘10, p. 325): pumilus, strictus, puberulus ; foliis 
nunc glabratis omnibus sessilibus plerisque parce denticulatis, caulinis floralibusque linearibus, 
imis et radicalibus sublanceolatis deorsum attenuatis; racemo 8-12-floro spicato; pedunculis 
alternis 1—2-floris seu pedicellis brevissimis cum sepalis e basi lata lanceolatis sensim acuminatis 
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; Bigelow. This species may be described as inter- 
mediate between P. Cobea and P. pumilus, Nutt. The specimens are only 5 or 6 inches high, 
herbaceous, erect, leafy ; the leaves from 11 to 21 inches long, and 11 to 24 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. Сорга, is over an inch long. It is somewhat 
viscid externally and slightly bearded within the lower lip. Sterile stamen like that of P. 
Cobzea, but the beard denser. | 
PENTSTEMON STENOPHYLLUS (sp. nov.): glaberrimus ; caule gracili 2—3-pedali ; foliis linearibus 
elongatis integerrimis, floralibus lineari-setaceis; panicula laxiflora; pedunculis oppositis 
patentibus gracilibus 2—5-йогїв pedicellis 2—4-plo longioribus; calyce parce glanduloso-pubero, 
segmentis ovatis margine scariosis ciliato-denticulatis acuminatis, acumine patente; corolla 
infundibuliformi-ampliata (fere sesquipollicari cerulea?) vix bilabiata, lobis brevibus conformibus 
rotundatis; antheris rima hirto-ciliolatis; filamento sterili glaberrimo summo apice dilatato.— 
Hills between Babacomori and Santa Cruz, Sonora; Wright, (1477.) 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 13 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- 
cosmus, and to the same-group with P. imberbis. If, as seems likely, No. 186 of the collection 
of Wislizenus, from Cosiquiriachi, belongs here, the corolla is blue. 
PENTSTEMON DASYPHYLLUS (sp. nov.) : velutino-puberulus; caulibus e basi suffructicosa strictis; 
foliis lineari-lanceolatis imisve oblanceolatis integerrimis obtusis junioribus preesertim molliter 
velutinis, floralibus gradatim minoribus cum racemo simplici laxo paucifloro glanduloso-puber- 
ulentis ; pedicellis alternis; sepalis ovato-oblongis obtusis ; corolla (5 purpureo-ceerulea ”’ 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, (1478). Valley of the Santa Cruz river on moun- 
tain sides, and in the valley of the San Pedro, Sonora; Capt. E. K. Smith, Bigelow & Thurber. Also 
