64 CRUCI FERAE 



Although a widely distributed plant in our area it only occurs in 

 patches, chiefly in clayey or muddy ground, so that it is absent from 

 a considerable portion of the county. Where geese are kept it is 

 almost sure to be found. It occurs in all the bordering counties. 



[C. DiDYMUs, Sm, Fl. Brit. ii. 691, Syme, i. 220, t. 159. A semi-maritimB 

 species which occurs in Hampshire, and as an introduced plant in Wilt- 

 shire and in Surrey, where in Kew Gardens it is a common weed. Not 

 yet recorded for Berkshire.] 



IjEPIDIUM, Linn. Gen. n. 718 (Tournefort, Inst. t. 103). 



**!,. RUDERALE, Liuu. Sp. PI. 645 (1753). Bowyev's Mustard. 



Thlaspi minus, Gerard, 204. Nasturtium angustifolium, Fuchs. 



Top. Bot. 34. Syme, E. B. i. 214, t. 154. Nyman, 64. Fl. Oxf. 37. 

 Casual. Waste ground. Rare. A. July- August. 



2. Ock. Waste ground near the Oxford Gas-works on the side of the 



railway, 1891. 

 4. Kennet. Near Newbury, Jackson, 1896. 



It has been found as a casual in Oxfordshire and Hants, and is recorded 

 from Surrey. 



[Ii. LATiFOLiuM, Liuu. Sp. PI. 644. Syme, E. B. i. 213, 1. 153. Dittander. Peat 

 pits about Newbury, Mr. Bicheno in Mavor^s Agr. Berks, 261 (1809). 

 Almost certainly an error for some other species, as L. latifolium is not 

 likely to occur so far inland.] 



**L. SATIVUM, Linn. Sp. PI. 644 (1753). Garden Cress. 



Comp. Cyb. Br. 481. Syme, E. B. i. 215, t. 155. Nyman, 65. Fl. Oxf. 37. 

 Casual. Waste places, heaps of garden refuse. Not permanent. A. April- 

 August. 



1. Isis. Wytham. 



2. Ock. Waste ground at Grandpont. By the railway, Didcot. Near 



Abingdon. 



3. Pang. Railway-side near Pangbourn. 



4. Kennet. Newbujy, In the trial grounds of Messrs. Sutton at Reading 



with the va7'. lacerum. 



5. Iioddon. Near Welhngton College, Grey in Well. Coll. List, 1874. 



Tw5rford, in the form of the var. crispum, DC, Prod. i. 204. Also oia 

 rubbish heaps at Reading. 



**Ii. viRGiNicuM, Linn. Sp. PI. 645 (1753). 



A North American species occurred as a casual in the fields near South 

 Hinksey in 1896, where it was noticed by ray friend, Mr. J. Rose of Oxford. 



Ii. campestre, R. Br. in Alton, Hort. Kew. ed. 2, iv. 88 ,1812), Mith- 



ridate Pepperwort. 

 Thlaspi vulgaiissifnum, Gerard, 204. T. campestre, Linn. Sp. PI. 641. 



Top Bot. 33. Syme, E. B. i. 216, t. 156. Nyman, 65. Fl. Oxf. 37. 

 ~ Native. Agrestal. Cornfields, waysides, open places in woods, widely 

 distributed, and not uncommon. B. April-September. 

 First record. Thlaspi [Thlajisi sph.] campestre, Dr. Noehden. Sunny ex- 

 posures, Mavors Agr. Berks, 1809. 

 1. Isis. Carswell, Miss M. Niven. Coleshill. Buscot. Cumnor. 

 Eaton Stibble. 



