238 TRANSACTIONS, NATURAL HISTORY SOCIETY OF GLASGOW. 



This form has a good deal in common with C. airata, but the 

 influence of that species is questionable. As with all other 

 deviations from the type, it is difficult to find a plant so fully 

 developed in all its parts as to enable all questions of affinity to 

 be definitely settled. 



C. saxatilis Linn., forma intermedia mini. 



This form should come under C. vesicaria L., as it seems inter- 

 mediate between C. Grahami Boott, and C. saxatilis L., but 

 differs from the former in being 15-30 cm. high, not growing 

 casspitose. and having leaves much shorter and natter ; from the 

 latter it differs in having 1-3 female spikelets, the lower one 

 cylindrical on a long hair-like peduncle and hanging when 

 mature ; lower glumes longer and upper as long as the perigynia, 

 subulate, blackish-brown with a light-coloured midrib and white 

 tip, perigynia as in C. Grahami but darker coloured, stigmas 

 three, style not so geniculate as in the type. 



This is the form which the artist had before him when he drew 

 plate 1684, and also the perigynia at the foot of the plate, in the 

 3rd edition of English Botany. 



In the young state, dried plants of this are so like small 

 plants of C. Grahami that they are liable to be confused with it ; 

 in fact, there are a few specimens mixed with the small form of 

 C. Grahami in the Royal Herbarium at Edinburgh. 



Some authors regard this as the form alpigena Fr., thereby 

 causing the difficulty experienced in trying to diagnose that form. 



Only on one of the Breadalbane mountains does this occur at 

 all plentifully, and there it grows in company with C. saxatilis 

 and C. Grahami, being to all appearance a hybrid between these 

 forms, of which C. Grahami is the male parent. 



Reports on Excursions.* 



Dalry to Fairlie, loth September, 1906. — Mr. D. A. Boyd 

 reported that this excursion, which was arranged jointly with 

 the West Kilbride Natural History and Archaeological Society, 

 took place during very unfavourable weather, and the attendance 

 was accordingly small. Having met at Dairy railway station, 



: The Lists of Musses, ELepatics, and Microfungi noted at Excursions in 

 1907 and 1908 have been incorporated as a Supplementary Report 

 (see p. 263). 



