On new or obscure species of Plants. 419 



Juiigermannia cochleariformis. With the former. 



complanata. On trees, Dens of Rubislaw and 



Leggart. 

 . bidentata. Stocket Moor. 



barbata. Den of Rubislaw. 



serpyllifolia. Abundant on trees. 



■ Tamarisci. Rocks upon the coast. 



diiatata. On trees, Den of Rubislaw. 



multifida. Common in several bogs. 



• Blasia. Bay of Nigg and Den of Leggart. 



• epiphylla. Frequent. 



To these must be added a minute species which is found upon 

 Hypnum piliferum, round the stems and leaves of which its slender 

 branches are entwined. It is also sometimes found on Polytrichum 

 abides. The leaves of this species are ovato-lanceoiate, acutely bi- 

 partitB;, and rather distant from each other. It seems to come near 

 JungermanniaTurneri. I have not as yet found it in fruit. J. Blasia 

 is said to be rare in fruit. It is abundant in the localities mentioned, 

 both in fruit, and with the flask like bodies. Jun. epiphylla is men- 

 tioned in British Flora as bearing fruit in September. In this neigh- 

 bourhood it invariably sends out its " white sparkling silvery 

 threads," or fruit-stalks, in March and the beginning of April. 



V. — Observations on some New or Obscure Species oj" Plants. No. I. 

 By G. A. Walkek Arnott, LL. D. F. L. S., &c. 



Calotropis, H. Brown. (Asclepiadeae.) 

 In the second volume of the Hortus Kewensis, Brown describes 

 two species of this genus, one, the C gigantea, from India, the other, 

 C. procera, from Persia. Dr Hamilton, in the Linnean Society's 

 Transactions, Vol. xiv. p. 246, conceiving that he had found the 

 Persian plant also in India, described a new species as such, and to 

 which Dr Wight, in his Contribution to the Botany of India, gave 

 the name of C. Hamiltonii. Since then Dr Wight has made fur- 

 ther observations on this species in the Madras Journal of Litera- 

 ture and Science, Vol. ii. p. 69. t. i. although, through inadvertency, 

 he has resumed the name of C. procera. Having had no opportu- 

 nity of examining the plant of the Hortus Kewensis, it may appear 

 presumptuous in me to attempt to decide on the diiference, if any, 

 between it and Hamilton's; but having received from Arabia Petrsea, 

 a specimen of a Calotropis, which answers to the short character given 

 by Dr Brown, I have little doubt of its being the same as that from 



VOL. II. NO. 11. F f 



