60. ACROSTICHUM. 399 



entire ; texture herbaceous ; both surfaces densely matted with short silky 

 yellowish-grey hairs ; areolce small, oblique. Bot. Her. p. 339. 



Hab. Mexico, Liebold. 



5. H. pinnatifida, Baker ; st. tufted, 1-2 in. 1., glossy, chesnut-brown, clothed 

 with soft yellowish hairs ; fr. 2 in. each way, deltoid in general outline, with a 

 large oblong-lanceolate subcrenate terminal lobe and two spreading ones on each 

 side, which reach down within J in. of the rachis, both blunt, the lowest 1 in 1. 

 and auricled at the base ; texture subcoriaceous ; both sides densely coated with 

 yellowish hairs ; areolce small, copious. 



Hab. Central America, Wendland, 438. 



C. II. pinnata, J. Sm. ; st. 6-9 in. L, glossy, dark chesnut-brown, clothed with 

 soft yellowish hairs ; fr. 5-6 in. L, 3-4 in. br., the apex deeply pinnatifid, below 

 this 2-3 pairs of distinct pinnae, the upper ones oblong-lanceolate, 1-1^ in. 1., 

 -J in. br., the lowest larger and forked at the base, all repand ; texture herba- 

 ceous ; both sides thinly clothed with soft yellowish hairs ; veins oblique, 2-3 

 times diehotomously forked, anastomosing principally near the midrib. J. Sm. 

 Gen. Fil. p. 33. (name only}. 



Hab. Jamaica, Wiles. This is not very far from Gymnogramma rufa, but the pinnae 

 are adnate, and the groups of veins join slightly. Our descriptions of this and the two 

 preceding are taken from J. Smith's specimens, now in the British Museum. 



7. H.'Griffithii, Hk. fil. & Thorns.; st. 8-12 in. 1., scaly towards the base, 

 villose throughout ; fr. 1 ft. or more L, 6-10 in. br., subdeltoid, pinnatifid or 

 pinnate, with 2-4 distinct pinnce on each side, which are 3-4 in. 1., 1-1^ in. br., 

 entire, acuminate, the lower ones stalked ; texture herbaceous, thick ; rachis and 

 both sides villose ; main veins barren and pinnate, the veinlets fertile and 

 copiously reticulated. #. Sp. 5. p. 192. H. Wilfordii, Hk. Fil. Ex. t. 93. (the 

 pinnatifid variety}. 



Hab. Khasya, Hie. fil. & Thomson ; Formosa, Wilford. This differs from the foregoing 

 by its barren main veins, and constitutes the genus Dictyocline of Moore. 



Anetium, Splitg. Sori lax, placed loth on the veins and scattered also in the 

 spaces between them. Sp. 7. 



8. H. (Anet.) citrifolia, Hk. ; rhizome creeping ; st. ^-9 in. 1., weak, com- 

 pressed ; fr. pendent, 6-24 in. L, 1-4 in. br., oblong or subspathulate, narrowed 

 gradually to both ends, the edge entire ; texture thick but flaccid ; colour pale- 

 green ; midrib often lost in the upper part, winged on the back below ; areolce 

 vertical, long-hexagonal. Hk. Sp. 5. p. 193. 



Hab. West Indies to North Brazil. An anomalous species, with the habit of Antro- 

 phyum, in which genus it is placed by Fe, and in the fruit connecting Grammitidece with 

 Acrostichece. 



TRIBE 13. ACROSTICHECE. 



Sori spread in a stratum over the under surface or rarely over both surfaces of the 

 frond, not confined to the veins only. GEN. 60-61. ' 



GEN. 60. ACROSTICHUM, L. 



Sori spread over the whole surface of the frond or upper pinnse, or occasionally 

 over both surfaces. A large genus, almost entirely tropical, including groups with 

 a wide range in venation and cutting. TAB. VII. & VIII. fig. 60. 



