43 
As mentioned D. melanosticta varies considerably in size, and also in colour, 
but I am firmly convinced that this variation is due to different growing-places 
only. Smaller plants, which apparently have grown in open places, have generally 
bright-green leaves (yellowish-green when dried) that are 30—50 cm long, largest 
pinne 15—20 cm long, 6—7 cm broad, tripinnatifid, rarely tripinnate below; most 
tertiary segments entire, 5—6 mm long, 2 mm broad. Larger plants from*shaded 
localities are generally dark-green (blackish-green when dried), lamina 60—80 cm 
long, largest pinne 25 cm long, 10—12 cm_ broad, tripinnate-quadripinnatifid ; 
tertiary segments 10—15 cm long, 3—4 mm broad, sharply and obliquely toothed 
or lobed. Between these two extremes one finds all possible intermediates. — Be- 
low I enumerate only a part of the numerous specimens seen, 
Mexico: Vera Cruz, Cordoba, H. Fink nr. 43, 56, 64, me 152 a 126, 152 (B): GaLeorri nr. 6320 
(Kew); Boureeau nr. 1790 (H, RB), 1838 (H), 2011 | et dor, ROR ann (B, H, RB, S, U), 
Colipa and Misantla, LieEBMANN (H); Jacuapan, Purpus n a (Wy 2 a (B), Oajaca; Jecuteius, 
Chinantla, LresMAnn (H’. — San Luis Potosi: barranca G Las bane pcb nr. 3825 (B, RB, 
el - Seuinie S20: my Chiapas: Ruinas de Palenque, C. et E. Sever nr. 5494 a Ww); 
istobal, G. Munch n RB). 
selenite Dept. Alta at nee v. Tércknerm ed. J. D. S, nr. 8050 (B, W), 8628 (B, W), 
8641 (W), tas (R) (distributed as Nephrodium amplum Bak., nr. 8050 as N. villosum Bak.); 
Senahi, DonNELL SmiTH nr. 1562 (W); near the Finca Sepacuite, Coox et Grices nr. 502 (W); 
near Cacao, H. S. Barer nr. 196 (W). — Dept. Solola, Santa Barbara, W. C. Suannon ed. J. D.S 
nr. 249 (W) 
Some of the specimens from Guatemala come very near to 
ar. bullata (Christ). 
Syn. Aspidium bullatum ensise Bull. ? Herb. Boiss. II. 6: 53. 1906. 
Dryopteris bullata C. Chr. Ind. Fil. Suppl. 30. 1913. 
Differs mainly by its concolorous, bright-brown indusia, rather glandular un- 
der surface and numerous larger bullate scales along the midribs of tertiary pinnule 
beneath. 
Costa Rica: ad rio Navarro, WERCKLE nr. 16766 (CC, RB, W); Maxon nr. 624 (W); Guadeloupe, ALFARO 
nr. 16579 (R). 
S, 
310. Dryopteris interjecta sp. nov. 
Type from Guatemala, leg. H. vy. Tércknerm ed. Donn. Situ nr. 8049 (W), 
Species critica, medium inter D. melanostictam et D. amplam tenens, squamis 
basalibus rachiumque iis D. amplae similibus, configuratione laminae ac pinnarum 
basalium cum D. melanosticta congruens. 
Stipitibus fuscis, ad 80 cm longis, squamis anguste lanceolatis, ee te- 
nuibus, pallide brunneis subdense onustis, ad basin squamis numerosis, linearibus, 
flexiblibus more D. amplae circumdatis. Lamina metrum longa, ovata, firmiter her- 
bacea, in siccitate atroviridi, tripinnatifida. Pinnis suboppositis, ‘ad 12 cm inter se 
distantibus, basalibus iis paris sequentis subaequilongis, ad 40 cm longis, stipitatis 
acuminatis, e medio latiore versus basin paulo attenuatis. Pinnulis 1—2 cm inter 
se distantibus, majoribus sessilibus vel breviter petiolatis, medialibus adnatis, supe- 
6* 
