5242 Mr Arnott^s Tour to the South of France 



latter, but by the description given by Sir James Smith, it ap- 

 peal's to differ in the leaf. The EngHsh jilant has the leaves 

 '' angular and finely toothed,"" and agrees in that respect with 

 the character given by Roemer and Schultes. The Montpellier 

 and Corsican species has the leaf much angled, but otherwise very 

 entire. The nei'ves, however, at the angles, and here and there 

 along the margin, project, and form each a small callous point. 

 Whether or not this be considered a good distinctive character, 

 the C. neopolitanum of Tenore is certainly different from either : 

 this last flowers in autumn, and the petals are much shorter, and 

 more obtuse *. 



On the 1 4th April we went before breakfast to Mirval. Here 

 there is a cavern, into which one is obliged to enter on all fours ; 

 but it soon becomes very spacious In it there is said to be (for 

 our time scarcely permitted us to enter, and we were unprovided 

 with torches) a great body of water : it is by many supposed to 

 be the source of a pretty large stream, which does not make its 

 appearance for a considerable distance. Theligonum cynocrambe^ 

 Lavatera maritlma^ Gouan, (a plant much confused with L. ol- 

 bla), Asplenium glandulosum (the two last remarkably scarce), 

 Li?iaria simplex^ Lathyrus setifi)lius, Fumaria capreolata (a 

 _ . — 



* On the Pic St Loup, on some stones under the brushwood, we found 

 Hypnum tenellum^ whilst at Vaucluse we met with a moss which in some 

 things so resembles this species, that I felt undecided whether or not to pro- 

 nounce it distinct, unless I had compared it with what I consider the true 

 H. tenellum. Its occurrence on the Pic de Loup enabled me, I think, to state 

 decidedly that the two are very different. That found at Vaucluse has been 

 also discovered by M. Requien in several other localities about Avignon, and 

 Bridel has given it the name of Hypnum laxepennatum in Requien's herba- 

 rium. I suspect, notwithstanding, that it is a species formerly collected by 

 Bridel at Rome, and already named by him in his Species M uscorum, P. ii. 

 p. 111. Hyp. curvisetum. He, however, describes the leaves as subserrate, 

 whereas in our plant they are entire : he considers his as a variety of H. 

 Scleicheri (betwixt which, again, and //. conferlum, I can find .no good diffe- 

 rence) ; but ours differs, by the scabrous seta, and entire leaf. The character 

 I propose is as follows : 



H. curvisetum. — Caule vage ramoso, foliis ovato-acuminatis integerrimis e stri- 

 atis, nervo supra medium evanescente, theca globosa subcernuata (v. po- 

 tius sequali nutante), operculo rostrato, seta grosse muriculata. 

 Peristomium internum cilios inter lacinis habet : habitu multum refert H. te- 

 nellum, at foliis latioribus, et seta valde difFert ; refert etiam H. confer- 

 tum, at differt seta muricata breviori, et foliis integerrimis. 



