202 CARDAMINE PRATENSIS, L., AND ITS SEGREGATES. 



dmtata. It seems to affect boggy or damp woody spots, and its 

 long radical leaves are not spreading as in C. pratensis, but are 

 erect or ascending, and are composed of much fewer, larger, 

 angled, and toothed leaflets, the terminal one being generally 

 cuneate. The flowers are white or pale lilac, and the inflorescence 

 is more elongated than that of the other forms. The Kew plant 

 which I have sent to the Botanical Exchange Club for distribu- 

 tion was kindly compared with the specimens in the ■ Prodromus ' 

 Herbarium at Geneva by Mons. C. DeCandolle, and the name con- 

 firmed ; it seems thoroughly to agree with the figure in Reichenbach's 

 'Plants Critics,' tab. 4308/3. I have seen specimens collected 

 in Gallicia by Besser, and others from Erfurt, Leipsic, and Stock- 

 holm. The dmtata of ' Herb. Florae Ingricae' is the exact counter- 

 part of the Kew plant, as are also those just mentioned. ( \ palustris, 

 Peterm. (Leipsic), is a strong-growing bog form near dmtata; of 

 this the author makes two varieties, isophylla and heterophylla, the 

 leaflets of the radical leaves of the latter being rounded, slightly 

 toothed, whilst those of the cauline are ovate, entire. 



C. Hayneana, Welw. (Reichenbach's ' Plantae Critics,' t. 4308 c), 

 is an extreme form of pratensis, of which the figure above quoted 

 gives but a faint idea. It is in fact a variety with quite the habit 

 of C. hirmta, but with flowers about three times the size of those 

 of that species, and with the stem and leaves of pratensis. In the 

 British Museum are type specimens collected by Welwitsch himself 

 at Vienna ; these have cauline leaves, with numerous small round 

 leaflets and white flowers, hardly half the size of those of ordinary 

 pratensis. A plant identical with this in every respect is one from 

 Roemer's Herbarium (now in the British Museum), labelled "C. 

 nova species." In Neilreich's * Flora von Wien/ where ( '. pratensis 

 is divided into three varieties — a Hayneana, ftgenuina, and ydentata 

 —it is stated that these three forms pass imperceptibly from one into 

 the other ; Hayneana is described as having leaflets as a rule quite 

 round, but sometimes linear or lanceolate. A plant I collected by 

 the Thames, between Kew and Mortlake, agrees thoroughly in 

 habrt and size of flower with Welwitscli's, and only differs from 

 that in its lanceolate leaves. This is an uncommon, but a widely 

 spread form. In the British Museum there is a specimen, collected 

 in N.W. America by Douglas, which ought to be placed here; as 

 also another from Newfoundland. At Kew one of Rupert Huter's 

 Tyrolese Plants, labelled C. pratensis, L., var. stricta, Welw., i 

 exactly Hayneana. I cannot distinguish specimens in Herb. 

 Lechler, labelled 0. chilensis, DC., as well as others (bearing same 

 name) collected by Dr. R. 0. Cunningham in 1867-G9 at Sandy 

 Point, Cape Negro, St. Nicholas Bay, and Port Grappler (Chili), 

 from the Kew Thames side plant. In Herb. Bentham a specimen 

 from Gratz, Marbourg, comes here. Italian specimens of G. 

 Matthioli, Moretti, are intermediate between this and ordinary 

 pratensis. 



