112 On the Low Temperature of Particular Caverns. 
sed fructum omnino implens, carnosa, succulenta. Septa nulla nisi 
vestigia fere obliterata, et in angulis placenta? immersa. Semina 
latissima, compresso-plana, margine alata, duplici serie imbricata^ 
adscendentia I testa simplex, tenera, crassiiiscula, superficie dense 
mucilaginosa, lateris interioris prope basjn hylo lineari-oblongo no- 
tata : albumen parcum, carnosum, lacteum, molle. Embryo magnus, 
rectus, incumbens, lacteus : colyledones latse, cordatae, obtusae, inte- 
grae, compressae, applicatae : ra.dicula cylindracea, crassiuscula, coty- 
ledonibus triple brevier, infera, recta, basi obtusissimar 
Frutices {Meocicani v. Peruviani) dijfusi, ramosissimi, scandenies, 
glabrif frondosi, Passiflorae habitu similes. Folia iripari-piinnata, aU 
terna, sessilia, apice terminata cirrho valido in spiram convoluto triplici 
V. quinque ordine dichotomo : foliolis integerrimis petiolulaiis ; injlmis 
stipulas mentientibus. Flores magni, axillares, solitarii, pedunculati 
pedunculus medio bracteis 2 oppositis parvis impari-pinnatis preeditus, 
sordide purpurei fasciis albis notati aut lutei. 
1. C. scandens, segmentis calycinis late cordato-subrotundis, foliolis ellipticis 
mucronulatis. 
Cobaea scandens, Cavan. Icon. 1. p. 11. t. 16. et 17. etiamque Vol. 5. p. 69. 
t. 500. Persoon Synop. 1. p. 185. Lam. Encyl. Suppl. 2. p. 305. Kunth in Nov. 
Gen. et Sp. PI. 3. p. 151. 
Hah. in Convalli Tenochitlensi prope urbem Mexico et ad Portum Acapulco 
Mexicanoruin. I7 w. Vulgd dicitur Yedra Morada^ id est, Hedera violacea. 
2. C. lutea^ segmentis calycinis lineari-lanceolatis mucronatis, foliolis oblongis 
acutis. 
Cobaea macrostema, Pavon. MSS. 
Hab. ad Portum Guayaquil in Regno Vuitensi Peruvianorum. Joannes Tafalla. 
(v. s. in Herb. Pavon. nunc in Mus. Lamb.) Praecedenti similis. Corolla 
lutea, minor. Stamina ultra limbum longe exserta. Stigmata longiora et^fingustiora. 
Obs. Nomen specificum Pavonii mutavi, quod genere diverse miniis recte cum 
regulis constitutis congruit * *. 
Art. XVI. — Observations on the Low Temperature of parti- 
cular Caverns'\. 
In endeavouring to account for the great cold which has been 
observed in particular caverns, an explanation of this singular 
fact must be sought for, rather in local peculiarities than in re- 
. lations of a more general nature. A phenomenon noticed by 
Professor Pictet, in the neighbourhood of one of those caves J, 
* In addition to my observations on the genus Jacaranda, (see this Journal, 
Vol. IX. p. 264,), I beg to add, that Mr Brown appears clearly to have been the 
first who has noticed the singular foimation of the anthers in that genus. 
*f- These ingenious observations are taken by permission from the article 
Physical Geography in the Edinburgh Encyclopoedia., which is on the eve of 
publication. They are necessary to complete the view of this interesting subject, 
which is given in this Journal, vol. viii. p. 1. 16 .— Ed< 
t See this Journal, vol. viii. p. 8.~Ed. ♦ 
