TAB. XXI 



• 



ACROSTICHUM HYB R IDUM. 



FILICES. 



Gy 



RATiE. 



Br. 



PoLYPODiACEiE. Kavlf Filices verrc. Willd 





• 



Gen. Char. ACROSTICHUM, Linn. Sori amorphi, seu Capsula per totam paginam inferiorem 



frondis (interdum diversa?) vel ad ejus partem sparsge. Involucrum nullum (nisi squamulae, vel 

 setae in quibusdam capsulis interstinctge). Br. 



Acrostichum hy bridum ; 



frondibus oblongo-lanceolatis subacuminatis, 



margine costa stipiteque 



paleaceo-hirsutis, fertilibus multo ininoribus glabris. 

 Acrostichum hybridum. Bory de St. Vinc. Voyage, v. 3. p. 95. Swartz. Syn. Fil. p.\\. Willd. 



Sp. Pl. v. b.p. 107. 



Acrostichum ciliare. Pet. Th. Trist. d Acugn . p •. 32 ? Carmichael in Descr. of the Island of 



Tristan da Cunha y in Linn. Trans. v. 12. p. 510. (fide specim. ejus.) 

 Acrostichum villosum. Sieber, Syn. Fil. n. 27. non Swartzii. 



Hab. Insula Borboniae. B 



ory 



Mauritio. Sieber, Bojer. Tristan da Cunha. CarmichaeL 



Caudex repens, brevis, squamis longis, numerosissimis, fuscis, lanceolato-subulatis dense obsitus, inferne fibris plu- 



1 



rimis, ramosis, ferrugineo-tomentosis instructus. 



Stipes 6 — 8-pollicaris, fusco-flavescens, squamis subulatis, fuscis, horizontalibus sparsim tectus. 



Frons oblongo-lanceolata, 6 — 8 uncias longa, duas uncias et ultra lata, submembranacea, indistincte marginata, 



medio costata, nervis subhorizontalibus versus eorum basin bis terve dichotomis, costa, superficie raro, mar- 

 ginibusque, dense squamoso-hirsutis. Squamce subulata?, purpureo-fuscse, duas vel tres lineas longae, sub lente 

 minute serrulatae atque pulcherrime reticulatae, areolis oblongis. Frons fertilis sterili triplo minor, squamis 

 nullis. 



» 



Capsulce totam inferiorem partem, costa excepta, tegentes, fuscae vel flavo-fuscae, pedicellata?, annulo crasso incom- 



pleto cinctse. 

 Semina oblonga, subreniformia. 

 Fig. 1. Capsulae. f. 2. Semina. f. 3. Squama, e margine frondis: — magn. aiwt. 



This seems in every essential particular to accord with the A. kybridum of Bory, who found the 

 plant in the Isle of Bourbon, and whose name we have here adopted. We have received the same 

 plant from Dr. Sieber, under the name of A. villosum of Swartz, which, besides being a native of 

 Jamaica, is described as having the sterile fronds on both sides, and the fertile one on the upper 

 surface, clothed with hairs ; and so Plumier figures them. It is also the A. ciliare of Capt. Carmi- 

 chael, and probablv of Du Petit Thouars. 



