A 
Rio Janeiro, Graziovu nr. 2053, 2382, 2462 (H), 4436, 5268 (B, H), 5269 (B, H, BR, Rg), 5270. (B, H). 
— Minas Geraes: lItacolumi, A. Sirveira nr. 1449 (RB); Serra de Ibitipoca, ScHwackE nr. 12334 
(RB), Moura nr. 57 (B). — San Paulo: Serra do Mar, Wacker ed. Ros. Fil. exs. austrobras. nr. 
429 (R, RB, W). — Sta. Catharina: Desterro, E. M. REINEcK (RB). 
NB. Polypodium ligustifolium Poir. Enc. 5: 553, in Ind. Fil. referred to D. 
denticulata, is ex descriptione and according to a specimen in RB from 
Herb. Desvaux a form of Polystichum adiantiforme (Forst.) J. Sm. Aspidium 
frondosum Wikstr. also referred to D. denticulata (Ind. Fil. 74) is D, meri- 
dionalis (Poir.) C. Chr. 
361. Dryopteris rigidissima (Hook.) C. Chr. sp. nov. — Fig. 27. 
Syn. Nephrodium denticulatum var. rigidissimum Hook. sp. fil. 4: 148. 1860 
(excl. loc. New Granada); Jenman, Bull. Dept. Jam. n. s. z 111. 1896. 
Type from Jamaica |leg. Witson and Purpre (not seen)|, Maxon nr. 1403. 
Rhizome, scales and general structure of the lamina not different from D. 
denticulata, to which species it should perhaps be referred as a variety, but the 
whole aspect of the plant is very different from all forms 
of that species, and I have never met with intermediate 
forms. — Lamina ovate or ovate-deltoid, 20 cm long 15—20 
cm broad, coriaceous, glabrous, finely dissected, 5-pinnate. 
Pinne and pinnule close; basiscopic pinnulze of the basal 
pinne less produced than in D. denticulata f. genuina., Ultimate 
segments cuneate-lanceolate, 4—6 mm long, not more than 
1—1'/: mm broad, mucronate not spinulose), entire or cleft, 
each with a simple or furcate vein and a single, small 
sorus. Indusium rather deciduous, reniform, scarcely more 
than 1 mm broad. 
From the very similar D. denticulata var. dissecta, 
referred by Hooxer hereto, it differs by its compact habit 
and mucronate teeth. 
Jamaica: Summit of Blue Mountain Peak, on very steep moist wooded 
Fig. 27. D. rigidissima (Hook.) slope, Maxon nr. 1403 (W, CC, H, Rg); O. Hansen (CC). 
C. Chr. Small pinna from Sto. Domingo: Prov. de la Vega, in Loma Bosilla, 2500 m, Fuerres nr. 
the upperside, nat. size. . 1782 (B). 
362. Dryopteris leucostegioides n. sp. — Fig. 28. 
s yn. nn denticulatum var. rigidissima Hieron. Engl. Jahrb, 34: 453. 
1905, 
reat from wi meewncbents Bogota, Linnie nr. 234 ‘(B!). 
