592 Underwood : The genus Alcicornium 



later authors with more or less precision, commencing with Gau- 

 dichaud and Presl, have used for the Australian species, does not 

 belong with it, and that only with doubt can Acrostichinn alcicorne 

 Willem., in the absence of its type, be referred to any species 

 known to-day. The overwhelming probability, however, points 

 to it as being the same as Acrostichinn Stcmaria Beauvois. 



With these modifications of existing nomenclature we proceed 

 to an enumeration of the species, of which there appear to be 

 thirteen known at the present time; of these eight species are in 

 cultivation at the Royal Botanical Garden at Kew, and seven species 

 at the New York Botanical Garden. Three species w^e have seen 

 only in herbarium collections, and there is only one {A. stimbaiv- 

 cnsc) which we have not seen in some form. 



fiyiiop \H of itie Hpecle» of Alcicornium * 



Sporopliyls bnmd, with no narrow strap-like divisions. 



Sporopliyls rounded at the apex, with entire or repand 



margins; sporangial area oval ; basal leaves erect. 2. A, angolejise, 



Sporophyls more or less lobcd at the apex. 



Apex with two rounded lobes ; margins otherwise 



entire ; sporangial areas reniform. 5. A, Ellisii. 



Apex with irregular margins showing manifest ten- 

 dency to fork ; sporangial areas irregular in shape 

 following the outline of the leaf; basal leaves 



thick, with deep irregular pits when dry. 8. A, madagascai-iefise 



Sporophyls with narrow strap-like lobes, in shape resembling 



a stag's horn, 



Sporangial areas on a stalked scutiform disc. 4, A. coronarium^ 



Sporangial areas on the surface of the sporophyl. 



Sporangial areas at or below the forks and not on 



the strap-like lobes of the leaf. 



* We add here the original description of the only species not seen : 

 ** y. sumba%v€nse n. sp. Christ. 



Inter P, alcicorne Desv. et P. Wallichii Hook, habitu intermedium, sed omnium 

 nngustissimum. Frondibus fertilibus pallidis binis, ternis sivequinis, ligulatis loriforrai- 

 bus, ad basin sensira attenuatis, 65 cm longis, parte latissima 3 cm latis, sulcato- 

 nervosis, adpresse floccosis, media circiter longitudine dichotomo-divisis, alque iterum 

 bis dichotomis, segmentis ultimis furcatis (laciniis uliimis usque ad 20 pro fronde) 

 lanceolato-triangiilaribus rostratis, involutis, 7 ad 6 cm longis obtusiusculis, omnibus 

 soriferis, sons faciem inferiorem usque ad basin laciniarumomnino tegentibus, immature 

 pube densaalbida obtectis, mature rufis partim ista pube tectis. Frondibus sterilibus, 

 politis nitidis scariosis fragilibus spongiosis ochraceo-fulvis reniformi-rotundatis 15 ad 

 30 cm diametro, margine laciniatis laciniis profundis furcatis. Nervis conspicuis 

 areolas elongatas angulosas formantibus, nervulis aliquot lateralibus liberis inclusis. 



DifTert a P, alcicorni lamina magis decomposita, angusta, segmentis multo minori- 

 bus, rostratis, numerosis. Differt a P. Wallichii statura multo minore, omnibus parti- 

 bus angustioribus, et soris terminalibus nee in sinu ramorum positis." Warburg, Mon- 

 sunia i ; 64. 1900. 



