74 PROCEEDINGS OF THE ACADEMY OF 



mens of P. pulcherrimum ; both of which, -with F. capitatum, etc, do seem to 

 pass into Arctic forms of P. cceruleum. 453. Phlox Docglash, Hook. 454. 

 P. humilis, Dougl. ? 455. P. Hoodii, Richardson. 403. Collomia gracilis, 

 Dougl. 404. C. linearis, Nutt. 456. Gilia pinnatifida, Nutt. ined. 457. 

 G. inconspicoa, Dougl. 458. G. longiflora, Benth. (Cantua longiflora, Torr.) 

 459. G. aggregata, Spreng. ( G. pulchella, Dougl.) With wbite as well as red 

 flowers. 460. G. spicata, Nutt., in PI. Gamb. The same as 271 of Parry's 

 collection. 461. G. congesta, Hook, var. ? with the leaves mostly entire. 

 "Alpine." (462. Chamcerhodos erer.ta. See Rosacea?.) 463. Gilia (Lepto- 

 dactylon) pungexs, Benth., from which G. Hooker i scarcely if at all differs. 



CONVOLVULACE^]. 



464. Cuscuta arvensis, Beyrich, var. pentagona, Engelm., a form with a 

 small calyx. 579. Evolvulus argenteus, Pursh. 



SOLANACEiE. 



465. Solanum rostratum, Dun. 466. Physalis lobata, Torr., a form with 

 the leaves little lobed; the corolla purple or blue. 467. Solanum triflorum, 

 Nutt. 



GENTIANACE^. 



468, 469. Gentiana affinis, Griseb. ;* the former a more condensed form ; 

 the latter is 439 of Parry's separate collection. " Common in the subalpine 

 region." 470. G. Parryi, Engelm. f, a form with narrower leaves than Dr. 

 Parry's specimens of the preceding year. "Subalpine." 471. G. detonsa, 

 Griseb., which Dr. Engelmann, with reason, reduces to a variety of G. crinita.% 

 472. G. fkigida, Hsenke, var. algida, Griseb.: most beautiful specimens of 

 Parry's 305, so new to this country. 473. G. acuta, Michx.; iu various 

 forms ; perhaps in some sets with a little of the too nearly related G. tenuis. 

 474. G. HUMiLis,Stev. 475. G. prostrata, var. Americana, Engelm. 476. Swer- 

 tia perennis, L. 477. Pleurogyne rotata, Griseb. II "South Park, sub- 

 alpine." 553. Frasera .speciosa, Dougl. 



ASCLEPIADEJE. 



478. Asclepias brachystephana, Torr. ; a dwarf form of this rare species, 

 collected on the plains. 479. A. speciosa, Torr. (A. Douglasii, Hook.) 



* Gentiana affinis, Gris. genuine, ; caule viresoente; bracteis calycem fere axjuantibus; calyiis 

 lobis insequalibus tubum longiorem integrum sen vaiius spathacseo-fissum subrequantibus ; corolla 

 anguste elavata pallide coerulescente. 



Gentiana affinis, var. brachycalyx: caule purpurascente ; bracteis florum superiorum brevia- 

 simis; calycis tubo abbreviate truncato seu brevissime dentate lobatove ; corolla majore subven- 

 tricosa azurea. 



This form has the appearance of a distinct species, but the characters taken from the calyx 

 are variable; besides, Dr. Parry has bent specimens of it with a more distinctly lobed calyx. 

 Other specimens collected by Mr. H. Engelmann, on Sweet Water River, have either an entire or 

 a semispathaceous calyx, with lobes of different proportions ; his specimens show many ascendiDg 

 stems growing from a large root, with numerous yellowish fleshy fibres. G. Engelmann. 



f Gentiana Pakrti, Eng., a narrow-leaved farm. Dr. Parry informs me- that the narrow-leaved 

 varieties are often one-flowered, and their stems single, while the broader-leaved form (coll. Parry, 

 1861,No. 304) usually occurs in bunches ; the boat-shaped bracts, the small calyx lobes, and the bifid 

 folds of the corolla are never wanting, and distinguish it readily from the allied G. calycosa. G. E. 



% Gentiana barbellata, Engelm. in Trans. Acad. St. Louis, 2, t. 11 (ined.). is Dr. Parry's 440, a 

 truly alpine, dwarf and very beautiful species, closely related to G. crinita, ciliata, &c. 



\ On examination of a series of specimens, Dr. Engelmann is inclined to view G. tenuis, Griseb. 

 as an extreme form of G. acuta, and also to adopt the conclusions of those who regard the latter 

 as specifically identical with G. Amarella of the Old AVorld. He adds the following note. 



Gentiana acuta, Michx. Undoubtedly an American subspecies of 6. Amarella. Messrs. Hall 

 and Harbour have sent a large suite of specimens, which, together with Dr. Parry's (1861, Nos. 307 

 and 309), show an extreme variability in size, manner of branching and arrangement of flowers, 

 shape and size of leaves, proportion of calj'x, size and color of corolla and size of seeds. 67. Engel- 

 mann. 



| Dr. Engelmann remarks upon this, 1st. That the ovules cover the whole surface of the ova- 

 rian cavity; 2d. That the structure of the corolla is that of Swertia, the nectarian glands at the 

 base of the segments of the corolla being surrounded by a petaloid funnel with fringed edges; so 

 that the curious lateral stigma principally separates the genus from Swertia. 



[Mar. 



