AKABIS 45 



Alien. Waste groiind. Rare. B. April-October. 



First record. B. praecox, Wargrave, Mr. J. C. Melvill in Britt. Contr. 1871. 



2. Ock. Den ch worth, Wait. Waste ground, Grandpont. Didcot. Uffing- 



ton, by the railway. 



4. Kennet. Speen, Jackson. Near Reading, Tufnail. Plentiful about 



Newbury Station, where it is quite naturalized. 



5. Loddon. Wargrave in two places, Melvill. Near Wellington College, 



Penny. By the railway at Twyford and Maidenhead, and near Wel- 

 lington Coll. Station. On waste ground between Reading and Sonning. 



Var. BREvisTYLA (Jord. Diag. 102 as a species), known by the leaves having 

 from six to ten pairj of lateral lobes, while the pods are only from 45 to 50 

 millinaetres in lengt'i. In var. loxgisiliqua (Jord. 1. c. 103 as species), the 

 leaves have only from three to six pairs of lateral lobes, and the pods are 

 from 60 to 70 millimetres long. The former plant has been seen at Newbury 

 and Maidenhead. I am rather doubtful whether the relative length of the 

 pods will always be found to coincide with the relative number of lateral 

 leaf-segments. 



B. praecox is recorded for all the bordering counties except Buckingham 

 and East Grloucestershire. 



Dr. G. Beck states that Barbaraea, Beckm. Lex. Botan. 33 (1801), is the 

 older name for the genus, but I have not been able to refer to the work 

 mentioned. 



ARABIS, Linn. Gen. PI. n. 732. 



A. Mrsuta, Scop. FI. Carn. ed. 2, 11. 30 (1772^ Hairy Toioer Mustard. 

 Turritis Mrsuta, Linn. Sp. PI. 666. Arahis sagittata, DC. Fl. Fr. Supp. 



592. 

 Top. Bot. 42. Syme, E. B. i. 167, t. 116. Nyman, 32. Fl. Oxf. 24. 

 Native. Kupestral. Walls, dry banks, &c. Local and rare. B. May- 



Augnst. 

 First record. A. hirsuia. Walls at Hoe Benham, Mr. H. Reeks in 



Britt. Contr. 187 1. 



3. Pang. Sparingly on Streatley Downs, Bennett, Joum. Bot. (1873) 



138. Near East Ilsley on a dry bank. On Curridge Common 

 near Hermitage. 



4. Kennet. Walls at Hoe Benham, Reeks. Inkpen, near Walbury 



Camp. 



5. Loddon. Sonning Cutting, Tufnail. 



I have not seen this plant on the Coralline Oolite in Berkshire, 

 although it is found on that formation about Wheatley and Shotover 

 in Oxfordshire. 



A. Mrsuta is found in all our bordering counties. 



A. perfoliata, Lam. Enc. Meth. i, 219 (1783^ Toiver Cress. 



A glabra, Bernh. Syst. Verz. Erf. 195 (1800). Turritis glabra, Linn. 



Sp. PI. 666. 

 Top. Bot. 43. Syme, E. B. i. 169, t. 119. Baxt. t. 430. Nyman, 32. 



Fl. Oxf. 24. 

 Native. Septal and viatical. Hedge-banks and sandy waysides in 



open sunny situations. Local and rare. B. May-July. 



