OF ARTS AND SCIENCES : OCTOBER 14, 1862. 61 



antheris parce hirsutis ; filaraento sterili apice dilatato bine barbato. — 

 " On the Uinta plains, very abundant and in large patches. June 5, 

 1844." Fremont. Clearly of this section, notwithstanding the prui- 

 nose pubescence. 



§ 6. (Genuini.) Herba3 variae. Corolla aut modice aut vix bilabiata, 

 labiis lobisve vulgo patentibus. Antherse glabrae, valvulis baud 

 raro denticulato-ciliatis, loculis a basi ad summum apicem usque 

 rima continua dehiscentibus, elFoetJB apertaB, plerumque explanatse. 



* Undique glaberrimi glauci (summo caule P. C(Brule(B quandoque ex- 

 cepto), foHis integerrimis coriaceis, caulinis arete sessilibus seu 

 amplexicaulibus : inflorescentia thyrsoidea virgata, pedunculis 

 cymularum plerumque brevissimis seu vix uUis tri - plurifloris : 

 corolla superne pi. m. dilatata, vix bilabiata, lobis patentibus vel 

 patentissimis planis. 



•1— Gcerulijlori ; corollis baud pollicaribus laete azureis seu purpureo- 

 CEeruleis ; filamento sterili apice saepissime dilatato flavo-barbato. 



14. P. c^RULEUS, Nutt. (P. angustifolius, Nutt. in Fras. Cat., 

 Pursh.) Spithamjeus ; foliis lineari-lanceolatis, superioribus apiceque 

 caulis vulgo minutim pubescentibus ; sepalis lanceolatis sensim acumi- 

 natis margine stepius ciliolatis albo-membranaceis. — Upper Missouri 

 and Platte, etc. Nuttall probably included forms of the next species 

 under his P. ccendeus, probably with good reason. The pubescence of 

 the stem, not mentioned by Nuttall, is alluded to by Pursh. It is evi- 

 dent in a specimen said to be an original one of Bradbury's, in Rafl- 

 nesque's, now Mr. Durand's, herbarium, in that of Nuttall, in herb. 

 Acad. Philad. (from the Platte), and in that of Fremont from the Wind 

 River Mountains, in Dr. Torrey's herbarium ; — which are the only 

 genuine ones before me. But the same thing, only perfectly glabrous 

 and the sepals less white-margined, is Geyer's no. 154 (P. cceruletis, 

 Hook, in Kew Jour. Bot. 3, p. 299) ; and also Richardson's specimens 

 from the north, on which P. acuminatiis, ^3. minor, Hook. Fl. Bor.-Am. 

 is partly founded ; and these pass insensibly into such specimens as 

 Parry's no. 264, which is undoubtedly a narrow-leaved state of P. 

 nitidus, Dougl. So that one ought really to add the next species to P. 

 ccendeus, diverse as are the extreme forms. 



15. P. ACUMINATUS, Dougl., Lindl. Bot. Reg. t. 1295. (P. nitidus, 

 Dougl., Benth. in DC. Prodr. P. secundijiorus, Benth. 1. c. P. Fend- 

 leri, Gray in Pacif. R. R. Exped. 2, p, 168, t. 5, & in Bot. Mex. 



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