SOUTH AMERICAN PLANTS. 55 



which are double the length of those of the former species, are 

 conniveiit around the style in the middle of the corolla; the 

 flower on withering coils up in a spiral form, and the peduncle, 

 subsequently deflexed, increases to a length of 1| to ]| inch, 

 becomes thicker, and enlarges considerably at its apex ; the calyx 

 swells to an oblong oval form, nearly an inch long, 7 hncs broad, 

 10-angular, with ten prominent costate ribs, vesiciform, with the 

 mouth closed by five short connivent teeth : it encloses a berry 

 7 lines long, 5 lines diameter ; the pericarp is almost a putamen, 

 the upper moiety being thick and coriaceous, the lower half 

 thinner and more fragile; the dissepiment, and especially the 

 lunated placentae, become thickened, coriaceous and almost lig- 

 neous; it is apparently void of pulp, enclosing several seeds scarcely 

 a line in diameter and much compressed, which are described 

 by Dr. Hooker as being large ; but that term is evidently used in 

 comparison with those of Nicotianum, with which this genus was 

 thought to hold a close relation ; they are on the contrary smaller 

 than in many other genera of this tribe*. 



i 



F 



3. Thinogeton Lobhianum (n. sp.) ; — viscoso-pubescenSj caule stri- 

 atOj flexuoso ; foliis ovalibus, irregulariter sinuato-angulosis 

 et dentatisj imo cordato-auriculatis^ et in petiolum longius- 

 culum breviter attenuatis, 3-5-nerviis, tenuioribus^ utrinque 

 tomento brevi glanduloso subincano pubescentibus^ petiolo 

 tenui valde tomentoso ; floribus geminatis^ calyce pubescente, 

 corolla sub-violacea^ extus puberula^ staminibus insequalibus, 

 corolla 2-3-plove brevioribus. — Columbia et Peruvia; v, s, in 

 herb. Hook, (Columbia^ Lobb. no. 299. PerUj Maclean.) 



This species is evidently intermediate between the two fore- 

 going : the stem is much smaller, more striated, far more flexu- 

 ose, with much shorter internodes, and altogether more pubescent 

 than the last described; the leaves are 2 inches long. If inch 

 broad, on a petiole of 2^ inches, but probably the lower leaves are 

 somewhat larger : the peduncles are 9 lines long, slender and erect, 

 but become suddenly deflexed on the withering of the corolla; 

 the calyx is 4 lines long, 1^ line diameter; the corolla 1^ inch 

 long, I inch broad in the mouth ; the fructiferous calyx becomes 

 almost globular, 5 lines long and 4 lines in diameter, contracted 

 in the mouth, with five erect teeth, and enclosing a nearly glo- 

 bular berry 4 lines in diameter. 



POLYDICLIS. 



The Nicotiana guadrivalvis of Pursh, and the Nicotiana multi- 

 valvis of Prof. Lindley, have long been known as anomalous spe- 



A figure of this species, with generic details, is given in plate 30, 



