GENTIANA 



343 



3. Pang. Streatley, Pamplin. Abundant on the chalk as at Basildon, 



Pangbourn, Ashampstead. Haw-pit Farm. Moulsford. Compton 

 and Ilsley Downs. Very large specimens occurred near Ilsley, 

 Streatley, and Sulham. 



4. Kennet. Abundant on the West Ilsley and Lambourn Downs. 



On Walbury Camp and Gibbet Hill. Near Farnborough. 

 Sandleford. 



5. Loddon. On the chalk near Marlow, sometimes of great size and 



beauty, Mill, I. c. Park Place, Eose Hill, Stanton. Bisham Wood, 

 Melvill. Quarry Wood. Cookham. Culham. Stubbing's Heath, 

 with very reddish purple flowers. Waltham, &c. 

 Var. PRAECox, Raf. (?. lingulata, C. A. Agardh, Phys. Sallsk. Arsb. 

 (1824) 27, var. praecox, Murbeck, in Acta Horti Bergiana, Band 2, No. 3, 

 ( 1892) . This form of G. Amarella, which flowers much earlier in the year, 

 i.e. May- July, occurs on the Lambourn, West Ilsley, and East Ilsley 

 Downs, and is probably the plant referred to by Dr. Trimen in Journ. 

 Bot. (1878) 265-266, as follows : ' The Berkshire specimens differ from 

 all the above in the wider form of the corolla-tube with blunt segments 

 and in having oblong-spathulate obtuse leaves. All the flowers are 

 4 merous, and the pair of calj'x-segments veiy unequal. The only 

 other specimens I have seen which can be considered as probably the 

 same are from Tja-ol (Huter\ and are labelled '* G. germanica, var. 

 pygmaea " ; and on the whole I am more inclined to place the Berks 

 plant to G. germanica than to G. Amarella. Early flowering states of the 

 former have already been recorded. It is remarkable that the spring 

 flowering forms of both species should vary in precisely the same 

 manner, with 4-merous flowers and two of the calyx-segments much 

 increased in size.' The specimens were collected by Dr. Trimen on 

 June 2, 1 866, on the White Horse Hill, and are in Herb. Brit. Mus. 

 They appear to me to be rather an abnormal form of the var. praecox. 

 I can see no relationship with G. germanica or with G. campestris. They 

 have tetramerous flowers and sub-equal calyx-lobes. 

 G. Amarella occurs in all the bordering counties. 



'o 



G. campestris, Linn. Sp. PI. 231 (1753). Field Gentian. 



G. pratensis flore lanuginosa, Ray, Syn. 275. 



Top. Bot. 277. Syme, E. B. vi. 77, t. 919. Nyman, 500. Fl. Oxf. 195. 

 Native. Pascual. Dry open pastures and heathy commons. Very 



local. A. or B. August-October. 



First certain record. G. campestris, Dr. J. Bunny in Russell's Cat. of 1839. 



[2. Ock. White Horse Hill, Trimen, Britt. in Journ. Bot. (1873) 139. 



The specimens are not G. campestris, but probably G. Amarella, 



var. praecox. ] 



3. Pang. [Ilsley Downs, Bicheno in Mavor's Agr. Berks, 1809, is 



