7. DIACALPE. 8. MATONIA. 9. ONOCEEA. 45 



65. A. ohtusiloha, Hk. ; St. thicker than a swan's-quill, short, scarcely 4 in. 1., 

 tuherculato - muricate, dark glossy purple like the rachis, which is nearly 

 smooth and quite glabrous ; fr. firm-membranaceons, black-green, scarcely 

 paler beneath, 4 ft. and more long, pinnated, everywhere glabrous except on the 

 costs above, pinnated ; pinms 9-10 in. 1. (3-4 of the lowest pair much dwarfed), 

 shortly petioled, oblong, subacuminate, deeply pinnatifid nearly to the costse 

 below, less deeply upward ; lohes 5-7 lines 1., broad-oblong, scarcely falcate, 

 quite entire, very obtuse ; veins rather distant, forked, sori at the fork, copious, 

 small, prominent, nearer the costa than the margin. 



Hab. Sierra del Crystal, Trop. Africa, Mamm. — Equally distinct as a species with the 

 preceding. Somewhat allied to this, I possess a specimen of an Alsophila! (sterile), from 

 Johanna Island, E. Trop. Afr., gathered by Dr. Kirh : the pinna are all petiolate, 3 in. 

 I., oblong, shortly acuminate, deeply pinnatifid, especially towards the base, the lobes 

 rotundato-obsourely serrated, lowest inferior one generally free, glabrous ; eostce sub- 

 pubescent and, as well as the forked veins, with scattered buUate scales beneath ; rachis 

 black-purple, below the apex winged between the superior pinnae. 



Gen. 7. Diacalpe, Bl. 



Sori globose, the receptacle small, scarcely elevated. Invol. inferior, globose, 

 hard-membranaceous, entire, at length bursting very irregularly at the summit. 

 Caps, numerous, nearly sessile ; ring broad. — Tab. I. f. 7. 



1. D. aspidioides, Bl. Hi. Sp. l.p. 69. D. pseudo-Coenopteris, ITze. 



Hab. Malay Islands ; Sylhet and Assam ; Ceylon. — Fr. tripinnate, submembrana- 

 ceous, often deciduously crinite j pinnl. oblong-cuneate, lobed and more or less decur- 

 rent. This genus seems more appropriately placed with the Cyathem than with the 

 Diclcmniea. The fronds much resemble those of Davallia nodosa. — What ia D. Mada- 

 gascariensis, F^e, Gen. Til. p. 339. ? 



Gen. 8. Matonia, Br. 



Recept. of the sori expanded into a firm-membranaceous, umbrella-shaped, 

 obscurely 6-lobed, stipitate invol., which covers and encloses 6 large sessile caps. 

 Not arborescent. Veins forhed, free, except those around the sori, which are closely 

 reticulated. Tab. I. f. 8. 



1. M.pectinata, Br. in Wall. PI. As. Bar. 1. 1. 16. £l&. Sp. 5. p. 286. 



Hab. Borneo and Mt. Ophir, Malacca. — One of the rarest and handsomest Ferns. 

 Fr. ample, fan-shaped, 1^-2 ft. w., hard-coriaceous, each portion subscorpioideo-pinnate on 

 one (the superior) side. Firml. consequently all secund pectinato-pinnatifid. 



Tribe II. DioKSONiBiE {excluding HymenophylleEe). 



Sori globose, situated on the lacTc.or apex of a vein,. Invol. inferior svhglobose, 

 free, sometimes covering the whole sones, closed, at length bursting irregularly ; more 

 frequentlp cup-shaped, entire or with 2 lips. — Ca/udex ra/reh/ arborescent. Venation 

 free or anaMomosing. Gen. 9-14. 



Gen. 9. Ono'^lea, L. Sw., Mett., Hk 



Sori dorsal, globose, on the veins of the changed and contracted pinnae of the 

 fertile fr. and quite concealed by their revolute margins. Invol. very thin, 

 delicate-membranaceous, hemispherical or half-cupshaped, originating from the 

 inferior side of the sorus, or wanting. — Caud. erect or creeping. Fr. stipitate 

 dimorphous, pinnate or pinnatifid, with free or anastomositig veins. Large herba- 

 ceous Feias of cold or temperate climates. Tab I. f. 9. 



