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SOUTH AMERICAN PLANTS. 57 



PolydicUs multivalvis. Nicotiana multivalvis, Lindl Bot. Reg. 

 tab. 833 i Don, Did. iv. 466 ;— viscido-pilosa, foliis carnosis, 

 ovato-lanceolatis, breviter.petiolatis, utriiique acuminatis, in- 



manrme 



1 



tariis, paucis, axillaribus ; corolla magna, limbo explanato, al- 

 bida, venis purpm-eis picta, 5-6-mera.— Columbia River, in 

 locis saxosis. 



This plant is said to be of a strong bircose odour and viscid ; 

 the leaves of the specimens I have seen are 6 inches long, 2^ 

 inches broad, on a petiole not longer than ^ or l an inch, which, 

 together with the midrib, is fleshy, broad, and semiterete. The 

 peduncle is scarcely more than \ inch long; the^ calyx about 



1 inch in length, and f inch diameter in its broadest part, con- 

 tracted above, and divided into five, sometimes six very acute lan- 

 ceolate teeth, one-third of its entire length ; it has ten or twelve 

 prominent nervures with intermediate reticulations. The tube of 

 .the corolla is cylindrical, somewhat swollen at the base, 1| inch 

 long, { inch diameter j the border is very broad> expanded, about 



2 inches across, and dinded to nearly half its breadth into five, 

 sometimes six triangular obtuse segments : it is of a whitish 

 colour, with anastomosing purphsh hues. The stamens are equal 

 in number to the segments of the corolla, and the anthers rise 

 to the mouth of the tube. The beriy is large, globular, 1^ inch 

 diameter, marked with deep grooves, corresponding with the 

 number of cells, which vary from six to twelve ; it is umbilicate 

 at the summit, and crowned by the persistent style, its lower 

 half being closely invested by the swollen calyx. 



2. Polydiclis quadrivahis. Nicotiana quadrivalvis, Pursh, FL 

 Am. Sept. i. 141 ; Lehm. Hist. Nicot. c. 45. tab. 4; Don, 

 Diet. iv. 466 ; Bot. Mag. tab. 1778 ; — viscido-pilosa, caule her- 

 baceo, ramoso ; foliis oblongis, utrinque attenuatis, integris, 

 superioribiis lanceolatis, subsessilibus ; fioribus 5-meris, ovario 



3-4 



3-4-lobo. — Missouri- 



^ The leaves of this species appear somewhat smaller than in the 

 foregoing species, and are slightly ciliate on the margin, with 

 jointed articulated hairs; the corolla is also much smaller, and 

 the globular, usually 4- celled capsule, wholly enclosed in the per- 

 sistent calyx, is about half an inch in diameter. 



The Nicotiana nayia, Lindl. Bot. Reg. tab. 833, referred by 

 Don to his section Polydidiay cannot belong to this genus, as its 

 ovarium is bilocular, and as it corresponds in few respects. The ♦ 



plant has certainly nothing of the habit of a Nicotiana, and it is 

 difficult, in the absence of a satisfactory specimen, to determine 

 to what genus it should be referred. 



VOL. II. 



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