356 The Flora of Wiltshire. 



Senebiera, (Pers.) Wart Cress. 

 Linn. CI. xv. Ord. i. 



Named in honour of M. Senebier, an eminent Genevese physio- 

 logist. 



1. S. coronopus, (Poiret.) common Wart Cress. Swines Cress. 

 Compounded of korone, a crow, and pons, a foot, illustrative of tbe 

 shape of its leaves. Engl. Bot. t. 1660. Reich. Icones, ii. 9. Coro- 

 nojms Ruellii (Smith). 



Locality. Rich waste ground, chiefly in the vicinity of farmyards. 

 A. Fl. June, September. Area, 1. 2. 3. 4. 5. 



Although this plant has not been observed but sparingly in any 

 of the districts, yet it may not be uncommon, but inconspicuous. 



Raphanus, (Linn.) Radish. 

 Linn. CI. xv. Ord. i. 



Name. From ra, (Gr.) quickly, and phainomai, (Gr.) to appear, 

 from its rapid vegetation. 



1. R. Raphanistrum, (Linn.) Wild Radish. Jointed Charlock. 

 White Charlock. 



The termination,-astrum or-istrum, was attached by the Romans 

 to the names of cultivated plants, to denote wild ones resembling 

 them, thus, apiastrum from opium; menthastrum from mentha; 

 rapistrum from rapa; siliquastrum from siliqua; and similarly ole- 

 aster and pinaster from olea and pinus. Raphanistrum therefore 

 means garden-radish-like. Engl. Bot. t. 856. Reich. Icones, 4172. 



Locality. In cornfields and waste grounds, on a gravelly soil, 

 often a troublesome weed. A. Fl. June, August. Area, 1. 2. 3. 4. 5. 



General in all the Districts. Equally frequent and troublesome 

 a weed as Sinajns arvensis, which is its general companion in arable 

 land, and liable to be confounded with it by the student. The closed 

 calyx, however, and deeply veined petals sufficiently distinguish 

 this, even previous to the* production of the siliques, which render 

 the generic character too obvious to be mistaken. Flowers mostly 

 yellow, with deep purple veins changing to white in maturity. The 

 fruit of Raphanus consists of a very small two-celled pedicclliform, 

 usually sterilo pod, with a long moniliform beak bearing the seeds, 



