OF ARTS AND SCIENCES : JUNE 14, 1870. 281 



Mixed with dwarfed specimens of the preceding, from which Nuttall'a 

 character of " elongated-lanceolate segments of the calyx" was proba- 

 bly taken. 



§ 2. Corolla inter campanulatam et rotatam, calyce modice longior. 

 Filamenta basi quasi in lamellam dilatata. — Perennes, folio- 

 lis intcgris, superioribus nunc alato-confluentibus, inflorescentia 

 laxiore. 



(P. grandiflorum, Benth., of Mexico, I do not possess, and have 

 barely seen in herb. Kew.) 



2. P. c^eruleum, L. Common from the arctic regions and Alaska 

 to California and through the Rocky Mountains, also through Northern 

 Asia to Europe; very rare eastward (in New York and New Jersey). 

 — P. acutiflorum, Willd., which is reduced by Ledebour to a variety 

 of this species, is an Alaskan form, with ovate acute lobes to the co- 

 rolla (Pallas, Chamisso, &c). All the North American, like the Hima- 

 layan, forms of this species incline to have wing-angled seeds, — 

 quite as much so as in 



Var. foliostssimuji (P. cceruleum, var. pterospcrma, Benth. in DC. 

 Prodr.). Valde viscido-pubescens ; caulibus bipedalibus usque ad 

 apicem cum ramis floridis corymbo-is foliosissimis; foliolis in rhachin 

 alato-marginatam srepe confluentibus ; floribus minoribus; staminibus 

 styloque corolla (calycem 2 - 3-plo superante) snepius brevioribus. — 

 Through the Rocky Mountain region, Geyer, Fendler, Parry, Vasey, 

 Watson, &c. This approaches 



3. P. Mexicanum, Cerv. (Mexico ?) This is distinguished by its 

 shorter corolla, and short lobes of the calyx, which are only half the 

 length of its tube. 



4. P. iiujiile, "Willd. Spithamreum ; caulibus laxis 1 - 2-fol:a- 

 tis ; floribus subcorymbosis paucis longius pedicellatis ; calyce ultra 

 medium o-fido ; ovulis 2-4 seminibusque 1-2 in quoque loculo. — 

 P. pulchellum, Bunge, Ledeb, &c. P. Richardsonii, Graham. P. 

 capitatum, Benth., non Esch. P. pvdcherrimum, Hook., a small- 

 flowered form. — Rocky Mountains to those of California, and through 

 the arctic regions and Alaskan islands to Siberia. — P. capitatum of 

 Eschscholtz, from the sands of California, with linear leaflets, &c, 

 cannot be this species, — is probably Gilia multicaulis, or some allied 

 species of that genus. 



5. P. reptaxs, L. Atlantic States from New York south and west 

 to Nebraska. 



VOL. VIII. 36 



