30 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



2. Polystichum adiantiforme (Forst.) J. Sm. Hist. Fil. 220. 1875. 

 Poly podium adiantiforme Forst. Prodr. 82. 1786. 



Poly podium coriaceum Sw. Prodr. 133. 1788. 

 Aspidium coriaceum Sw . Schrad. Journ. Hot. 1800 2 : 40. 1801. 

 Polystichum coriaceum Schott, Gen. Fil. under plate 9. 1834. 

 Aspidium capense Willd. Sp. PI. 5: 207. 1810, not Sw. 1801. 

 Polystichum capense J. Sm. Bot. Mag. 72: Comp. 35. 1846. 

 Rumohra aspidioidcs Raddi, Op. Sci. Bologn. 3: 290. pi. 12. f. 1. 1819. 

 Aspidium discolor Langsd. & Fisch. Ic. Fil, 16. pi. 18. 1810. 

 Polystichum discolor Brack. U. S. Expl. Exped. 16: 207. 1854. 

 The type of Pohjpodium adiantiforme was from Polynesia; that of Pohjpodium coria- 

 ceum from Jamaica; of Aspidium capense from the Cape of Good Hope; of Rumohra 

 aspidioidcs from Brazil; of Aspidium discolor from Brazil. If it be correct to associate 

 these names for a single species, the range of that species is a most unusual one; yet 

 the points of difference noted in the series at hand from South Africa, Mauritius, the 

 West Indies, Bermuda, Brazil, New Zealand, and the Seychelles are such as appear 

 not to warrant segregation. 

 The following specimens have been noted from the "West Indies: 

 Jamaica: Near Cedarhurst, altitude 600 meters, Underwood 1552. Near Troy, 

 altitude 450 to 600 meters, Underwood 2867 . Crown lands 4 miles west of Troy, 

 altitude 750 meters, Maxon 2926. Hollymount, Mount Diablo, altitude 750 

 meters, Maxon 2227, 2229. Near Cinchona, altitude 1,500 melers, Harris 

 7599. The Red Hills, Day. Without locality, Jenman; Hart 252. 

 Cuba: Wright 999. 



Porto Rico: Near Cayey, Sintenis 2771. Mount Mandios, near Jayuya, E. G. 

 Britton <{• Marble 956. Maricao, Sintenis 434. Sierra de Luquillo, Eggers 

 1341 (small specimens). 



3. Polystichum christianae (Jenman) Underw. & Maxon in herb. Plate 2. 

 Aspidium christianae J enman, Hull. Bot. Dept. Jamaica II. 2: 285. 1895. 

 Confined to Jamaica, where it is said by Jenman to be "common in woods on the 



Manchester mountains at 2,000 ft. altitude." The specimens studied by the writer 

 are: 



Vicinity of Hollymount, Mount Diablo, altitude about 750 meters, Maxon 1880, 

 1955,2343. Mount Diablo, altitude 600 meters, Underwood 1891. Without 

 locality, Jenman. 



Jenman's description, which on the whole is good, applies to the maximum attained 

 by this species in both size and cutting. The general resemblance to I), mexicana 

 also is not exaggerated by him, though from the wide variation in cutting the similarity 

 is more pronounced in some fronds than in others in which the pinnules and lobes 

 are quite acute. The caducous indusia are really orbicular and centrally peltate in 

 attachment, except for which and for its general chaffiness the plant might pass 

 readily enough for a Dryopteris. The large chaffy bud terminating the truncate apex 

 is a conspicuous and nearly constant feature. 



Pohjpodium miser Heward," suggested by Jenman as a possible early synonym, is 

 clearly not referable to this species but to Dryopteris effusa (Sw.) Urban, and the "Poly- 

 podium effusum" listed separately by Heward following/', miser was presumably a 

 misidentification. 



Explanation of Plate 2.— Specimen from Hollymount, Jamaica, Maxon 1880. Scale about 3. 



4. Polystichum. decoratum Maxon, sp. nov. Plate 3. 

 Plants laxly spreading or pendent, fronds 4 to 8, 35 to 45 cm. long, closely fascic- 

 ulate, conform. Rhizome ascending, arcuate, slender, 2 to 4 cm. long, 5 to 7 mm. in 

 diameter, with very long coarse fibrous roots, clothed at the crown with numerous 



a Mag. Nat. Hist. II. 2: 460. 1838. Type from Jamaica. 



