137 



a^equired a new name and we have called it B. Jenmani. In a similar 

 way the Jamaican plant which Mr. Jenman referred to B. Virginainurrtj 

 is very distinct from that species which is very common in the north- 

 .ern United States and appears occasionally in the southern States as 

 far as Florida. It has a very marked biological character of retaining 

 its leaf of one season (and sometimes an earlier leaf also) until the 

 maturity of the sporophyll of the succeeding season For this reason 

 we have named it B. dichronum. Two spBcies of Dancea also require 

 new names as noted in our recent revision of that genus. 



The original descriptions of these four species are quoted below : 



Botrychium Jenmani, TJnderw. Fern Bull. 8 : 59. 1900. 



Root fleshy, from a short axis I-2cm. long ; sterile lamina separa- 

 "ting at a height of l-2cm. and usually at or below the surface of the 

 ground ; leaf stalf 2.5-4cm. ilong, flesh coloured or pinkish ; lamina 

 3-12cm. wide, 2.5-9cm. high, composed of a central bipinnatifid por- 

 -tion, and two similar but smaller lateral ones which take their origin 

 alternately at distances varying from 5-15mm. ; lower lateral division, 

 the larger with 4-6 lateral pinnules, each composed of 3-5 oval seg- 

 ments with finely crenate margins ; venation indistinct except in 

 younger laminae : sporophylls 12-2 2cm. long, including the rather 

 compact mostly tripinnate panicle. 



This species is comparatively common above Cinchoaa growing 

 among bushes and along trails. 



Botrychium dichronum, Underw. Bull. Torrey Club, 30 : 45. 1903. 



A moderately tall plant, allied to B. Virginianum, with sessile ster- 

 ile lamina and presistent leaf of the preceding year. Roots fleshy : 

 stem 15-20cm. long, smooth : sterile lamina broadly triangular, 20cm. 

 wide, 15cm. long, tripinnatifid with about five pairs of nearly opposite 

 gradually diminishing pinnae, the lowermost with longer pinnules on the 

 outer side and inclined forward at an angle ; pinnules 8-10 on each 

 side of a winged rachis, alternate, cut nearly to the midrib into 6-10 

 segments set at an angle of 4")° with the rachis, the lower ones slightly 

 narrowed at the base, and 3-5 toothed at the apex, all gradually 

 simpler towards the apex of the lamina : panicle triangular, spreading, 

 3cm. or more long on a slender stalk 4cm. or more long, 2-3 pinnate. 



This plant is quite frequent in the region above Cinchona and 

 Morce's Gap extending up on John Crow Peak and Blue Mountain. 



A fine series of specimens is in the Herbarium of the Department of 

 Public Gardens, Jamaica. Since seeing the plant in the field we find 

 it attains a larger size than the original description indicates. 



Danaea Jamaicensis, Underw. Bull. Torrey Club, 29 : 675. 1902, 



A low, coarse plant with acuminate sterile pinnae and narrow 

 pointed pinnae on the sporophylls Rootstock unknown; stipes pale, 

 18-24cm. long, with 2-4 nodes; sterile leaves with a terminal and 

 11-12 pairs of pinnae, about 2cra. apart except the lowest pair which 

 is smaller, 10-14cm. long, 1.7-1. 9cm. wide, tapering rather abruptly 

 into a slender deeply serrate acuminate point; veins mostly forked, the 

 intercostal spaces about 12-14 to 1 cm. (maasured above the furcations) ; 

 sporophylls with about 8-12 pairs of pinnae, about 2 cm apart, short- 

 stalked, 5-7cm. long, 5-7nim. wide, obtuse at base and tapering at 

 .apex ; rachis somewhat alate above. 



This appears to be the species confused by Jenmxi with D. std' 



