IIYMIiNOPIIYLLUM. V6 



21. H. pyramidatnm, Dcsv. ; " frond pinnate piloso-subto- 

 mcntosc on both sirlcs, pinnne elongate acute cuneate at the 

 base subadnate vepando-dentate obi^curcly denticulate, rachis 

 winged, stipes terete subglabrous winged above." JJesv. in 

 AUm. Soc. Linn. ParAl p. 332. 



Hah. " Wiirni parts of America," Desvaux. " Frond about 1 foot long." 

 — Probably a variety of //. seriveum. 



22. li.elasticum, Bory; fronds ovate acuminated thin and 

 membranaceous but rather rigid and higlily clastic bi-tri])in- 

 natifid above below pinnate, pinna; bijiinnatifid, the segments 

 narrow-linear obtuse ciliated as well as the costa, involucres 

 very small semiorbicular, the base cuneate and sunk, valves 

 short ciliated, stipes not winged more or less haiiy. — Willd. 

 Sp. PL V. p. 520. Sieb. Syn. Fil. n. 78. Hook, et Grev. Ic. 

 Fil. p. 135. 



Hab. Mauritius and Bourbon, Borif, Bojer, Steher. — This species well 

 deserves its specific name ; for when dry, at least, the sides become recurv- 

 ed, and it is hardly possible to keep the specimens flat except by pressure. 

 Sori very small and the valves of the involucre peculiarly short. 



23. H. Berteroi, Hook.; fronds oblong ovate or lanceolate 

 moderately attenuated clothed with tawny silky stellated hairs 

 pinnated below bi-tripinnatifid above, pinnae and primary di- 

 visions approximate ovato-lanceolate obtuse or acuminated 

 more or less deeply pinnatifid, the segments broadly linear 

 obtuse, veins not lamellate, involucres very small suborbicu- 

 lar sunk very hairy, stipes elongated hairy terete not winged. 

 (Tab. XXXIII. C.) 



Hab. Mountains of Juan Fernandez, Bertero, n. 1540. Chiloe, Cuming, 

 n. 11. — Stipes 3 — 5 inches long. Fronds 4 — 6 inches, in general aspect 

 approaching II. scriccum, but acuminated, smaller, veins not lamellate, 

 involucres much smaller and shorter. One of my specimens is so deeply 

 divided as to resemble //. elasticum, but the lower portion of the frond is 

 clearly pinnated, and the surface, as well as the costae and margin, covered 

 with copious tawny stellated hairs. 



24. H. obtusiim, Hook, et Arn. ; small, fronds caespitose 

 broadly oblong very obtuse trijiinnatifid pinnated below, pin- 

 na) or primary divisions approximate cuneate pinnatifid and 

 subflabelliform, segments narrow linear, margins and costa 

 clothed with long branched hairs appressed to the frond, in- 

 volucres on the ultimate segments equal in breadth to them 

 nearly orbicular, their base broadly cuneate sunk, the valves 

 much ciliated. (Tab. XXXHI. D.) 



Hab. Oahu, Lai/ S,- Collie, in Bcechey's Voyage. — Stipes very slender, 

 short, not winged, hairy. Plant small and tufted. Fronds *2 inches long 

 glossy 5 ultimate segments as it were corymbose, so as to form a blunt and 

 broad extremity. Hairs copious, confined to the costa and margin, many 



