38. ASrLENIUM, §§ EUASPLEXIUJr. 107 



slightly crenatc, the two sides unequal, the upper one the broadest, and narrowed 

 suddenly at the base ; texture subcoriaceous ; veins pinnate, inconspicuous ; rachis 

 ])olished like the stem ; sori linear-oblong, 3-G on each side of the midrib. — 

 Hk. Sp. 3. p. 13(3. Brit. F. t. 29. 



Hab. Temperate regions of the Old World, from Britain and the Azores eastward to 

 Japan and the Himalayas, where it ascends to 6-8,000 ft. ; S. Africa ; South Australia, 

 Van Diemen's Land, New Zealand, Sandwich Islands ; N. America, and southward 

 along the Andes to Peru. — TheMadeiran A. anceps, Sol., and S. American A. castaneum, 

 Ch.am. & Schl., seem to be luxuriant forms. The latter has the frond sometimes 18 iu. 

 and the piuuis 4 in. 1. : A dcnsiun, Brack., is a reduced alpine form from the Andes. 



38. A. arcuatum, Liebra. ; st. tufted, very short, polished, blackish ;/r. arcuate, 

 G-9 in. ]., \ in. br., linear, with 20-30 very close-placed horizontal subdimidiate 

 sessile pinnce on each side, which are ^ in. or rather less br,, ^ in. deep, blunt at 

 the point, the upper side slightly crenate, slightly auricled, and narrowed sud- 

 denly at the base, lower line entire, nearly straight or decurved in the lower 

 ones ; texture subcoriaceous ; rachis black, and polished like the stem ; veins 

 pinnate ; sori short, only 1 or 2, parallel with the lower edge of the pinna;. — 

 Jlk.Sp. 3. p. 142. t. 189. 



Hab. Mexico. — Probably this ought to be joined with A. monanthemum. 



30. A. exfensum, Fee ; st. tufted, 4-6 in. 1., polished, blackish ; /;■. 12-24 in. 1., 

 |-1 in. br., with 20-40 sessile pinnae on each side, which are ^ in. 1., J-f in. deep, 

 blunt and entire, the upper side rather the broadest, and often cordate, whilst the 

 lower is merely rounded at the base ; texture coriaceous ; veins inconspicuous ; 

 rachis polished like the stem, with 2 hairy lines running up it, sometimes bearing 

 gemmae, and throwing out branches from the axils of the pinnae ; sori liuear- 

 oblong, 2 or 3 on each side of the midrib. — Hk. Sp. 3. p. 142. 



Hab. Andes of Columbia and Peru. — A larger plant than A. Trichomanes, with pinnae 

 very blunt, sometimes nearly round. 



40. A. Petrarchce, D. C. ; st. densely tufted, 1-2 in. 1., wiry, nearly black, 

 densely glandular when young ; fr. 2-3 in. 1., \ in. br., linear-lanceolate, with 

 (j-10 horizontal sessile pinnse on each side, which are j in. 1., rather less br., 

 cordate-ovate, the point blunt, the edge sinuated or pinnatifid, the base unequal, 

 slightly truncate on the lower side ; texture subcoriaceous ; veins obliquely pin- 

 nate, el)eneous ; rachis and young fronds glandular ; sori oblong, very short, 4-G 

 on each side of the midrib.— -fT-i". Sp. 3. p. 138. Hk. £ Gr. Ic. t. 152. A. pilosum, 

 Guss. 



Hab. France, Spain, Italy. — Distinguished from A. !rw/wma?ies by its glandulosity 

 and more deeply-cut pinnae, 



41. A. monanthemum, Linn. ; st. densely tufted, 3-6 in. 1., naked, polished, 

 chesnut-brown ; fr. 12-18 in. 1., |-1 in. br., with 20-40 horizontal sessile subdi- 

 midiate jy2«?i<E on each side, which are f-^ in. I., j in. deep, the upper side crenate, 

 suddenly narrowed at the base, often distinctly auricled, the lower more or less 

 distinctly cut away in a straight or, in the lower pinnte, decurved line ; texture 

 subcoriaceous ; veins flabellate ; sori linear-oblong, usually 1 or 2, parallel with 

 the lower edge of the pinna;. — Hk. Sp. 3, p. 140. 



Hab. Madeira, Azores, Abyssinia, Cape Colony, Sandwich Islands and IMexico along 

 the Andes to Chili. — A larger plant than A. Trichomanes, with the sori typically one or 

 two to a pinna ; but in some of the forms, — for instance, A. Gahottii, Fee, and A. Men- 

 zicsil, Hk. & Gr. Ic. t. 100, — more numerous. 



42. A. normale, Don ; st. 4-6 in. 1., tufted, wiry, blackish, polished ; fr. 8-12 



