THE COMMON HARTS-TONGUE FERN, 



4. obtufidmtatum (M.). A very pretty dwarfish narrow-frondcd variety, having the margin Shallow!?, 

 sometimes deeply lobed, the lobes frequently separated by broad sinuses, and tlio whole notched with 

 nearly uniform blunt conspicuous teeth ; the apex is usually blunt, the midrib not reaching the end ■ the 

 sori are longish masses irregularly placed. Found near Ilfracombe, in 1855, by the Rev. J, M. Chanter, 



5, mbcornutum (Tail). The peculiarity of this variety is its rigid coriaceous texture and upright 

 habit It resembles dvnticuhUum (8) in the small even toothing of the margin ; but the fronds arc more 

 incised or lobatc; Uiey also terminate abruptly, and the rachis protrudes near the ajiex and forms a 

 horn or hook on the under side. The fronds are sometimes furcate ; son few, scattered. Mr, A. Tait of 

 Edinburgh, first noticed it in the nursery of Mr, Sang, at Kirkaldy. 



0. cornuttitn (M.) is a very beautiful, as well as curious variety ; the fronds are coriaceous, somewhat 

 undulate, crcnato or deeply lobed, the IoIkts scarcely toothed ; they also usually terminate abruptly, the 

 rachm projecting from the face, forming a long hook or horn, from which it takes its name. It fruits 

 plentifully, and is a thoroughly constant variety, invariably reproduced from its spores. It was found 

 in Yorkshire by Mr. Thome, and probably elsewhere, as it is not uncommon in collections. 



7. imperfectum (W-) is remarkable for the unfinished appearance of the margin of the frond, 

 which is entire, as though cut away as far in as the sori. It was found in nortli Lancashire by 

 Mr. Wollaston, in 1855, and promises to be a constant form. The fronds arc linear, strap-shaped, 

 somewhat irregular, truncate at the base, sometimes abrupt and sub-cornutc at the apex. 



8- dmticiitatum (WJ. This is of oxotic origin, having been found near Geneva by the Rev. 

 W. H. Hawker, but is so likely to be found in this country, or so certain to lie raised from spores* that it 

 is here included. The plant is dwarf in habit, the frond ramose, denticulate, and occasionally incised, 

 sometimes abrupt at the apex. As yet it has not fruited, but it is constant 



9. slenopkyUum (M.). A very narrow lineal- form, cordate at the base, with broad shallow entire 

 crenaturcs nearly to the point ; sori normal beneath, with numerous small roundish sori near the 

 margin above. It was found in Guernsey by Mr. J. James, of Vanvert 



10. crenato-tobatum (21). An elegant form, normal in size and general outline, but the margin, 

 especially in the upper half, is strongly crcnato- lobate, sometimes a little undulated. It is very distinctly 

 suprasorifcrous, the up|>er sori often largo and distinct like the lower. It appears to be a frequent form, 

 and has been found in Devonshire by the Rev, J, M. Chanter ; Saltwood, Kent, by Mr. P, Brent ; 

 Guernsey by Mr. 0. Jackson ; and Dorsetshire by Mr. Wollaston. It is sometimes very slightly 

 marginatc. 



IL tnrgulum (W.) — so called from the thick or muddy ap]>caraucc of the cellular tissue — is sub- 

 marginate. The fronds, which arc from six to eight inches long, are normal in outline, irregularly crcnato 

 or sub-lobatc, and fleshy ; the venation irregular and occasionally reticulate. It isquite distinct from all 

 other varieties and permanent under cultivation. It was found in Sussex, in 1854, by Mr. Wollaston. 



12. rcscctum (M,) is so called from the absence of the usual auriculatc lobes at the Iwisc of the frond ; 

 in other respects it resembles Mmwdum (13) and in&qudU (14), being irregular in width and development 

 It was found in Sussex, in 185-1, by Mr. Wollaston, and is constant 



13- smuatum (W.) differs from the ordinary form in having the margin of the frond (which is 

 occasionally multifid) sinuate, the lobe-like sinuosities being irregular in development entire or 

 obscurely crcnato. The venation is slightly confused in the contracted parts ; but the sori arc normal. 

 Found in Sussex by Mr, Wollaston in J85-1, and in Yorkshire by Mr. Clapham ; and is constant 



14. inm/uaie (A.). This handsome variety has the margin of the frond deeply incised, and distinctly 

 and unequally lobed, sub-pimiatitid j the npex generally multifid fimbriate; fructifications copious and 

 Irregular. It was found in Ireland by Dr. Allchiu in 1853, and is a constant and a rare plant. 



15. coriacvura (James). A dwarf form, very remarkable when fresh for its coriaceous texture. It is 

 irregularly inciso-dontate, generally abrupt, slightly marginate, sparingly and irregularly soriferous, 

 the sori on the under or upper surface, or actual edge of the frond. Found in Guernsey by Mr. James, 



10. lacinfatum (W.). A handsome variety, in which irregular portions of the frond are contracted. 



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