SCHIZAEACEAE (CURLY GRASS FAMILY) 45 



1. D. puncti!6bula (Michx.) Gray. (HAY-SCENTED FERN.) Fronds minutely 

 glandular and hairy (5-10 dm. high), ovate-lanceolate and acuminate in outline, 

 pale green, very thin, with strong chaffless stalks rising from slender extensively 

 creeping naked rootstocks, mostly bipinnate ; primary pinnae lanceolate, pointed, 

 the secondary pinnatifid into oblong and obtuse cut-toothed lobes ; fruit dots 

 minute, each on a recurved toothlet, usually one at the upper margin of each 

 lobe. (D. pilosiuscula Willd. ; Dennstaedtia punctilobula Moore.) Common 

 in moist and shady places, N.S. to Ala., rarer westw. to Minn. Frond sweet- 

 scented especially in drying. Forma CRISTA.TA (Maxon) Clute has the pinnae 

 cristate-forked at tip. Mass, and Vt. Forma SCHIZOPHYLLA Clute has fronds 

 often more deeply forked and the ultimate segments incised. Mass, and Ct. 



18. ONOCLEA L. 



Sporangia borne on elevated receptacles, forming roundish sori imperfectly 

 covered by very delicate hood-shaped indusia attached to the base of the re- 

 ceptacles. Fertile fronds erect, rigid, with contracted pod-like or berry -like 

 divisions at first completely concealing the sporangia, and at last, when dry 

 and indurated, cracking open and allowing the spores to escape. Sterile 

 fronds foliaceous. Rootstocks creeping and constantly forming new plants. 

 (Name employed by Dioscorides for some probably boraginaceous plant.) 



1. EUONOCLEA Hook. Fertile fronds bipinnate. 



1. 0. sensibilis L. (SENSITIVE FERN.) Fronds scattered; the sterile ones 

 long-stalked, the lamina 1-3 dm. long, deltoid-ovate, pinnatifid into a few 

 oblong-lanceolate sinuately lobed or nearly entire segments ; veins reticulated 

 with fine meshes ; fertile fronds contracted, closely bipinnate, the pinnules 

 rolled up into berry-like bodies. Moist meadows and thickets, very common. 

 (E. Asia.) Sports are frequent, especially bipinnatifid foliaceous fronds with 

 rounded lobes, free veins, and sometimes abortive sori, the so-called var. 

 OBTCSILOBATA (Schkuhr) Torr. 



2. STRUTHI6PTERIS Mett. Fertile fronds pinnate. 



2. 0. Struthi6pteris (L.) Hoffm. (OSTRICH FERN.) Fronds growing in a 

 crown; sterile ones short-stalked (6-30 dm. high), broadly lanceolate, narrowed 

 toward the base, with many linear-lanceolate pinnatifid pinnae ; veins free, the 

 veinlets simple; fertile frond shorter, with pod-like or somewhat necklace- 

 shaped pinnae. (Matteuccia Todaro.) Alluvial soil, Nfd. to Va., and north- 

 westw. July. The rootstock sends out slender underground stolons, which 

 bear fronds the next year. (Eurasia.) 



SCHIZAEACEAE (CURLY GRASS FAMILY) 



Sterile fronds tufted and linear-filiform (Schizaea) or resembling a twining 

 aerial stem with alternate paired palmately lobed leaves (Lygodium}. Sporangia 

 borne in double rows on narrow fertile segments, ovate, sessile, having a com- 

 plete transverse ring at the apex, and opening by a longitudinal slit. 



1. Schizaea. Sterile fronds rigid, simple or dichotomously branched. Plant dwarf, not 



climbing. 



2. Lygodium. Fronds with paired alternate stipitate leaf-like segments. 



1. SCHIZAEA Sm. CURLY GRASS 



Sporangia large, ovoid, striate-rayed at the apex, opening by a longitudinal 

 cleft, naked, vertically sessile in a double row along the single vein of the nar- 

 row divisions of the pinnate (or radiate) fertile appendages to the slender and 



