155 



SCHIZOSTEGE. 

 Hillebrand, Flora of the Hawaiian Islands, 1888, p. 631. 



This generally unrecognized genua was founded on the character of the recepta- 

 cle* "which are formed by intramarginal anastomoses of two fork branches or 

 l>y T-shaped expansions of simple veins." The spores are tetrahedral, and the 

 unpolished stipes traversed each by a single U-shaped vascular strand. The fertile 

 margin is twice the depth of the rest of the frond, making room for a spacious 

 receptacle. The indusium is remarkably broad and scarious, and very distinct 

 from the body of the frond. "The transition or thinning of the green frond in 

 the involucre is quite sudden and indicated outwardly by a straight line" in the 

 original species; in mine this line is a very evident groove, apparently making 

 the attachment a hinge. The type of the genus, 8. lydgatci Hillebr., was placed 

 in Chcilanthes by Baker in Synopsis Filicum, p. 475; and in Pteris by Christ in 

 Famkraeuter der Erde, p. 1G7, and by Diels in Nat. Pflanzenfamilien. The 

 affinity to Pteris is rather the closer, but it is a very foreign element in either 

 genus. The vein tips are large and hyaline. When neighboring sori coalesce the 

 anastomosis of the veins is apparently imperfect. 



I am indebted to Dr. Christ for comparing my specimens with authentic 

 8. lydgatei, and for sending me fragments from his specimen of this very rare 

 fern. The sori of the Hawaiian and Mindanao plants are indistinguishable. In 

 general aspect, 8. lydgatei is near Pteris quadriaurita, while the Mindanao species 

 approach Chcilanthes ; they seem to differ in texture, also, but it is hard to judge 

 this from the dried plants. 



Schizostege pachysora Copeland n. sp. 



Caudice crecto, breve, valido, radices ligneas emittente, paleis fuscis, 

 lanceolatis, subulatis coronato; stipitibns confertis, 30 cm. altis, flavido- 

 fuscis, paleis concoloribus patentibus vestitis, pedibus teretis, sursum 

 trifurcatis ; fronde 40 cm. alta, 20 cm. lata, bipinnitifida ; pinnis infimis 

 paulo deflexifl, 10 cm. longis, subacutis, sessilibus, 2/3 ad costam in 

 segmentis 5-10 mm. longis, 5—7 mm. latis, obtussisimis, intcgris divisis, 

 segmento primo basiscopico producto, falcato; pinnis mcdialibus aequali- 

 bus, decurrentibus et plerumque confluentibus, apices versus integris; 

 pinnis superioribus sensim diminutis in segmento apicale coadunatis; 

 lamina glabra, carnoso-subeoriacea ; venulis immersis, in seriem imam 

 costalem alaremque, rarius in segmentis in alteram areolarum conncxis; 

 soris simplicis vel confluentibus. 



Mindanao, Zamboanga, San Ramon, Copeland 1715. Ad terrain riparian) in 

 inontibus, alt. 700 m. 



Schizostege calocarpa Copeland n. sp. 



Caudice stipiteque cis S. pacbysorae similibus; fronde 35-40 cm, alta, 

 20 cm. lata, acuta, bipinnata ; pinnis infimis oblique deltoideis; sequenti- 

 bus lanceolatis, 10 cm. longis, 3 cm. latis, acuminatis, ad vel fere ad 

 costam incisis: pinnulis patentibus, 15 mm. longis, 4 mm. latis, obtusis, 

 deeurrenti-subcormexis, crenatis vel ad costulam semiincisis, carnoso- 

 subcoriaceis, glabris ; rhacbi cinerea, anguste subalata ; venulis omnibus 

 liberis; soris simplicibus; indusiis scariosis, rotundatis, latissimis. 

 (Tab. 12.) 



