GO. ACROSTicnuM. 399 



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

 yellowish-grey hairs ; areolce small, oblic|ue. — Bot. Her, p. 839. 



Hab. Mexico, Liehold. 



5. 11. jnnnatifida. 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 

 Bide, 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. Costa Rica, Wcndl^nd, 438. Guatemala, Bcrnoiulli, 32. \ 



G. II. pinnata, J. Sm. ; st. G-9 in. ]., glossy, dark chesnut-brown, clothed with 

 soft yellowish hairs ; fr. 6-G in. 1., 3-4 in, br., the apex deeply pinnatifid, below 

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

 §-|^ in. br., the lowest larger and forked at the base, all repand ; ^e^f«re herba- 

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

 times dichotomously forked, anastomosing principally near the midrib.— «/. Sin. 

 Gen. Fil. p. 33. (jiame only). , 



Hab. Jamaica, Wiles. — Tbis is not very far from Gymnogramma rvfa, but the pinnae 

 are adnata, 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. II. Griffithil, Hk. fil. & Thoms. ; st. 8-12 in. I., scaly towards the base, 

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

 pinnate, with 2-4 distinct pinncB on each side, which are 3-4 in. 1., l-\\ 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, Hi: Fil. Ex. t. 93. {the 

 pinnatifid variety). 



Hab. Khasya, Uh. fil. d: Tliomson ; Formosa, Wilford. — This differs from the foregoing 

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



§§ Anetium, Splitg. Sori lax, placed both on the veins aud scattered also in the 

 spaces between them. Sp. 7. 



8. H. (Anet.) citrifolia, Hk. ; rhizome creeping ; st. \-Q 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 

 Ytrtical, long-hexagonal. — Hk. Sp. 5. p. 193. 



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

 pJiyum, in which genus it is placed by F6e, and in the fruit connecting GrammitideoB with 

 Acrostichece. 



Tribe 13. AcROSTicnEyE. 



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-Gl. 



Gen. 60. AcRosxicnuM, L. (See page 518.) 



Sori spread over the whole surface of the frond or upper pinnce, 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. GO. 



