Pleurogyne.] GENTIANE^E. 



65 



even the shape of the ovarium, which I considered before to afford constant characters, is here not less fal- 

 lible than the regularity or irregularity of the calyx, as well as the large size of the ftower. It seems to 

 depend upon the nature of the locality, whether the root be biennial or annual, — The American G. bar- 

 bata differs somewhat from the Altaic form, by the lower leaves being more blunt, and by having a dis- 

 tinct style and nearly equal calyx. Though these characters are by no means constant, one may form, on 

 these grounds, an American variety; but we find, here and there, specimens which are quite identical with 

 some Siberian ones: besides, the variety /3. occurs in both countries. 



22. G. crinita (Froel.); caule stricto multifloro folioso, foliis cordato-lanceolatis, pedun- 

 culis superne nudis elongatis, corollae lobis oblongis rotundatis margine fimbriatis, fimbriis 

 deorsum longioribus basi loborum nullis, ovario ovato-lanceolato, seminibus aculeolatis. 

 Froel, p, 112. Pursh, \. p. 188. Beck^ p. 240. BjL Mag, t 2031.— G. fimbiiata. Andr, 

 BoL Bepos, L 509. — G. ciliata, Americana. L, 



Hab. Canada. Mr, Goldie. — This is widely dispersed throughout the United States. 



23. G. ventricosa (Griseb,); caule stricto gracili, foliis caulinis ovato-oblongis obtusis^ 

 calyce Ineequali alato ventricoso corollam invqlvente, corollae lobis a^qualiter crenuto-flm- 

 briatis. (Tab. CLII.) 



Radix annua, tenuis, ramosa. Caulis pedalis, strictus, glaber, teres, striatus, praeter ramos quosdam 

 insequales unifloros secundos simplex, superne gracilis. Internodia ima uncialia, cetera sensim longiora, 

 2-3-uncialia. Folia margine ad lentem tenuissime scabrida, ima rosulata obovato-subrotunda 1. obovato- 

 oblonga, in petiolum attenuata, (4-6" longa,) caulina ovato-oblonga obtusa, (unciam longa, 4"'-6"' lata.) 

 i2a??u' pedunculares, flexuosi, simplices, uno pari foliorum a flore remote instruct); pedunculus iccvtiiu-d.Xis 

 1 florus, ebracteatus, (3-4 uncialis.) Calyx clausus, ovoidens, (9"' longus, 4^5'" latus,) acuminatus, corollam 

 tertia parte superans, lobis tubum a^quantibus, binis lanceolatis acuminatissimis longe raucronatis, binis 

 ovatis acuminatis pauUo minoribus latins alatis (alse per sepala, cetera per scariosam membranam intra- 

 calycinam formantur.) Corolla inclusa, convoluta, 4-fida, lobis ovato-oblongis, tubum sensim ampliatum 

 sequantibus, elegantissirae jequaliter crenato-fimbriatis, obtusis. Filamenia brevissima (1-2'" longa,) lata, 

 membranacea, sub apice tubi inserta. Antherce ex tubo exsertse, introrsse, loculis basi distantibus extror- 

 sum connective merabranaceo cum filamento contiguo junctis. Ovarium elliptlco-oblongum, stamina paul- 

 lum superans, stylo nuUo, stigmatibus orbiculatis 2-lamellatis. Capsula ignota. 



Hab. Grand Rapids of the Saskatchawan. Between Cumberland House and Hudson's Bay. 

 Drummond, — One of the most remarkable species: the appearance is exactly like G, utriculosa, but from 

 the structure of the flower, it is nearest G. detonsa. 



Tab. CLII. — Fig. I, Flower;^^. 2, Corolla;^^. 3, Corolla laid open;^^*. 4, 5, Back and front view of 

 a stamen ;^5'. 6, Section of a calyx: — magnified, 



2. PLEUROGYNE. Escuschoi-z. ap. Cham. Liimma, \,p. 190, 



FovecB epipetalae glandiiliferee 0. Filamenta basi £equalia. Stigmata lateralia (ad sutu- 

 ras valvularum decurrentia.) Capsula unilocularis. Corolla rotata, corona fimbriarum 

 brevissima aucta. 



1. P, rotata (L, %\}b Swertia); foliis lanceolatis linearibusque, calycis lobis lanceolato- 

 linearibus corollam aequantibus, ovario acuto, seminibus sutura; valvularum insertis. — L, 

 Sp. PL }. p, 328. Pallas, 2. p, 98. {excL st/non. etjig, UL) t, 89./ 1. 2.— Gentiana ro- 

 tata. FroeL p, 105. ex descriptione {exclus, synon, et var, /3.) — Swertia sulcata. Fries, L c. 



VOL. II. I 



