197 



stances. As a rule it is better to manure lightly and frequently than, 

 to apply a large amount at longer intervals. 



(10) One of the best ways to utilise barnyard manure is to combine 

 it with such materials as supplement and conserve its fertilising con- 

 stituents. The best results are likely to be obtained by using com- 

 mercial fertilising materials in connection with barnyard manure, either 

 in compost or separately. As is well known barnyard manure is last- 

 ing in its effects, and in many cases need not be applied so frequently 

 as the more soluble and quick-acting superphosphates, potash and 

 nitrogen salts, etc. 



FERNS : SYNOPTICAL LIST— XL VII. 



Synoptical List, with descriptions, of the Ferns and Fern-Allies of Ja- 

 maica. By Gr. S. Jenman, Superintendent Botanical Garden, 

 Demerara. 



74. Polypodium angusti folium, Swartz. —Rootstock short-creeping, \ 

 in. thick, more or less clothed with reticulated acuminate scales ; stipites 

 numerous, crowded, l|-3 in. L, flattish, with one to several pair of indis- 

 tinct lateral glands to the narrow decurrent wings ; fronds 1-2 ft. 1. £-1 

 in. w. curved or sub-pendent, narrowly acuminate, long tapering at the 

 base ; coriaceous, naked, glossy, the underside paler, the margins entire, 

 often undulate-repand, cartilaginous-edged, the rachis stramineous, 

 slender; primary veins hardly stronger than the intermediary, the 

 areolae directed toward the margin, each containing a single free or 

 anastomosing soriferous veinlet ; sori terminal or dorsal, one to each of 

 the larger areolae. P. tameosum, Willd. 



a. var. P. amphosternon, Kunze. — Rootstock more elongated ; stipites 

 longer, less crowded and fewer ; fronds f-2 in w.; texture less coria- 

 ceous ; areolae and sori more copious. P. fasciale, Willd. 



Common on trees and rocks up to 5,000 feet altitude, very variable 

 in width ; the narrowest forms being only two lines wide, with a single 

 series of areolae and sori on each side of the rachis, while the broader 

 states have two to three series. The texture is very coriaceous, and the 

 edges are often revolute. The venation is abnormal and intermediate 

 between Campyloneuron and Goniophlebium. In narrow forms it quite 

 agrees with the latter sub-genus, a is found on rocks at 6,000 ft. altitude^ 

 its larger state gives it a distinct appearance, but in venation it is quite 

 identical with the type, the broader f ronded forms of which impercep^ 

 tibly pass into it. 



75. P. piloselloides, Linn. — Rootstock very slender, flexuose, wide- 

 creeping, freely branched, forming a net- work, clothed with fine pale 

 subsquarrose acuminate scales ; stipites scattered ^-1J in. 1., slender, 

 finely fibrillose scaly ; fronds dimorphous ; subcoriaceous, opaque when, 

 dry, dark green, freely clothed with scattered minute peltate — caudate 

 scales, which have a brown disk at the base ; barren oblong lanceolate 

 or ovate-lanceolate, the apex rounded acute or acuminate, the base 

 nsually cuneate, 1-2 in. 1, in. b., fertile linear-lanceolate, in. 

 1. 2-3 li. b. margins entire ; veins generally obscure, forming a row of 

 large costal areoke with free included branches and smaller exterior 

 Jneshes ; sori large, CDnSned t:> the costal areolae, terminal on the in- 



