CATHARINEA TENELLA ROHL. IN BRITAIN. 467 



a male inflorescence), the wider scarcely undulated leaves, and 

 the very few and inconspicuous interrupted lamellae. A certain 

 character sometimes occurs in the growth of the stems of C. tenella 

 which may easily give rise to a misconception. In some specimens 

 the stems of the fertile plants have a comal-like tuft of leaves 

 about half-way down (see fig. 11 x); these, however (unlike 

 C. undulata), are not the old leaves of the male inflorescence from 

 which the female stem has proliferated, but are the leaves of 

 an old female flower, and in the axils of these leaves withered 

 archegonia can be found. In such cases, apparently, the first- 

 formed archegonia have not been fertilized, and the axis of the 

 stem has grown on. and produced another female flower in the 

 following season. 



C. tenella has a laxer areolation than the ordinary form of 

 C. undulata. This is especially the case in the lower ovate-oblong 

 leaves, which with the few low lamellae much recall those of C. 

 crispa. C. undulata var. minor, however, as mentioned above, some- 

 times presents the same characters ; and in C. tenella itself the 

 areolation of the uppermost leaves becomes smaller. 



C. te7ieUa was found sparingly, in company with C. undtilata and 

 C. angustata, by a sandy roadside and in "drives"; in the former 

 place with Eadiola linoides. On the Continent it prefers damp 

 clayey or loamy places, but sometimes occurs on damp sand. In 

 the Kew Herbarium there are specimens collected by Bruch near 

 Berlin *'on damp sand, with Fuidiola linoides,'' which are quite 

 similar in habit, &c., to the British plants. 



I have placed a specimen of the Goudhurst C. tenella in the 

 Kew Herbarium for reference. 



Explanation of Plate 393.— Figs. 1-10. G. tenella Rohl. from Bedgbury 

 Wood, near Goudhurst, Kent. 1. Female plant, nat. size. 2. Male plant, nat. 

 size. 3. Two fruiting plants, nat. size. 4. Capsules x 12. 5. Upper leaf of 

 fruiting plant x 12. 6. Leaf from middle of stem x 12. 7. Leaf from a barren 

 plant X 12. 8. Areolation of leaf (fig. 6) at one-third from the apex x 255. 

 9. Ditto (fig. 5), ditto x 255. 10. Transverse section of leaf x 255. 11-13. 

 G. tenella, from a specimen in the Kew Herbarium (Helsingfors, coll. S. 0. 

 Lindberg). 11. Fruiting plant, showing proliferation at x , nat. size. 12. Cap- 

 sule X 12. 13. Areolation at one-third from apex of leaf, x 255. 



2 K 2 



