Gentiana.] - GENTIANE^. 



59 



superiora sensim majora, ex basi cordata 1. late ovata subrotunda I. rotundato-triangQlaria, obtusissiraa, 3- 

 Snervia, margine ad lentem serrulata, horizontaliter patentia, summa flori approximata. Fhres solitarii 

 in apice caulis at ramorum immersi, Calycis tubus turbinatus, (4'" longus,) raembrana intracalycina forma- 

 tus ; lobi ejusdem fere longitudinis, foliacei, late ovati 1. cordato-triangulares, basi supra incumbentes, ob- 

 tusissimi, longiores dimidiam corollam sequantos. Corolla clavata, (unciam longa, dimidiam unciam lata.) 

 Lobi ovato-oblongi, apice triangular! acuto, tubo triplo breviores, plica triangulari multifida acutissima duplo 

 longiores. Genitalia dimidiam corollam sequantia. Anfherce juniores connatse, deraum liberse, oblongte, 

 sagittatse, incumbentes. Germen oblongo-lineare, apice longe attenuatuin, stigraatibu3 revolutis, Capsula 

 elliptico-oblonga. Semina triangularia, 3-carinata, oblonga, striato-aspcriuscula, altcro latere acuta. 



Hab. Both forms occur at Mount Rainier, on the north-west coast. Mr, Tolmie. — The structure of the 

 lowermost leaves is remarkable; they are commonly reduced to little scales, the opposite pairs of which are 

 so far coherent as to form a loose vagina round the stem of three or four lines in length. I saw a similar 

 abortion in G. P?ieumonanthe, L., but the vagina did not proceed so far. The same peculiarity occurs in 

 the following^ species. 



Tab. CXLVI, — A, var. /3. Fig, 1, Flower laid open: — slightly magnified. 



9. G, Menziesii (Griseb.); caule erectiusculo, foliis abbreviatis oblongo-ellipticis obtusis 

 margine Isevibus, flore unico terminali sessili, caljce dimidiato utrinque latissimo, coroUae 

 lobis cordato-dilatatis triangulari-acutis, plica brevi 2-3crenata, antherls liberis. 



Radix crassa, apice squamosa. Caulis solitarius, simplicissiraus, pcdalis, striatus, iuferne squamatus, 

 superne foHosus. Internodia subzequalia, uncialia. Folia patentia, connata, ex basi subobliqua, semio- 

 vata, late ovalia, obtusa 1. obtusiuscula, 3-5-nervia, (unciam longa, 8'" lata.) Vagi?ice calycina; suba^quales, 

 late ovatae 1. ovate- obi ongas, apice hinc processibus viridibus (scpalorum rudimentis instructce. Corolla 

 uncialis, clavata, lobi ex basi transverse truncata dilatata, apice triangulari acuto, tubo duplo breviores, 

 plica brevissima 1. truncata crenulata. Stigmata elongata, revoluta. Germen oblongo-lineare, 



Hab. North- West Coast. Mr. Menzies. — This plant is most like G. platypetala^ from which it differs 

 by the form of the leaves and of the corolla, the base of which runs to a polut in this species, while it is very 

 large in G. platypetala, and also by the form of the lobi coroUce and the plica intermedia, as is stated 

 in the diagnosis, 



10. G, glauca (Pall.); caule humili ascendente, foliis obovato-spathulatis glaucis margine 

 lajviusculisj floribus paucis terminalibus, calyce integro, corollae pallide cseruleae lobis ovatis 

 obtusis pllcam integram multo superantibus, antheris liberis, seminibus tenui ala cinctis. 

 (Tab. CXLVII.) — Pall. Ross. 2. p. 104. t. 93. y^ 2. — G. caespitosa. Graham^ in Edin- 

 burgh Philos. Journ* 



r 



Hab. In the Rocky Mountains. Mr, Brummond. — This does not differ at all from the Asiatic plant. 

 The circumstance of the existence of this species in the Rocky Mountains, is a valuable contribution to 

 the laws of the geographical distribution of the Gentians; the greater part of those species which adorn the 

 short summer of the Arctic Zone being again to be met with in the similar climate of the higher mountains 

 of lower latitudes. Many examples of this fact are known with regard to European species, but scarcely 

 one among those of the new continent, all the numerous species of the Andes being confined to those lati- 

 tudes. G. glauca, however, affords an instance of a similar distribution to that above quoted; Stcller having 

 detected it in Bchring's Island, Pallas in Kamschatka, and Chamisso on both shores of Behring'a Strait. 

 Now, though the spot where Mr.Drummond found it, in the Rocky Mountains, lies under the same latitude 

 with Kamschatka, it is not to be forgotten that the isothermal line declines there to the south. 



Tab. CXLVII,— Fi>. 1, Flower;/^. 2, the same laid opcn;^^. 3, capsulc;^^. 4, ^qg^s ■.—magnified. 



