53 



54 



rowly lanceolate from a broader base, 

 acuminate, deeply pinnatifid into oblong-, 

 obliquely subfalcate, obtuse segs; un- 

 der surface copiously dotted with res- 

 inous globules; veins free, simple; sori 

 near margin; indusium reniform, min- 

 ute, glandular, somewhat pilose, evan- 

 escent. Fla. Synonyms: Aspidium strig- 

 osum Fee, Hist Fouget Lycop Antille 7 8 

 t 22 f 2 (1866). — Aspidium conterminum 

 Strigosiim D. C. Eaton, Torr cl b 7:62 

 (18 80). — Nephrodium conterminum Desv, 

 in part. 



D. NOVEBOSACENSIS A. Gray, Man 

 ed 1, 630 (1848). 



New York fern. Rtstock slender, 

 creeping; fronds 1-2° long, 4-6' broad, 

 lanceolate, tapering both ways from 

 middle; pinnae lanceolate, 2 or more 

 lowest pairs gradually shorter and de- 

 flexed, those of barren frond broader; 

 segs flat, oblong, basal ones oft en- 

 larged; veins simple or forked in basal 

 lobes; sori distinct, near margin; indus- 

 ium minute, margin glanduliferous. 

 Newfoundland; Minn; Ga; Ala; Ark. 

 Synonvms: Polypodium noveboracense 

 L, Sp PI 1091 (1753). — Aspidium nove- 

 boracense Swz, Schrad J bot 1800 (2): 

 38 (1801).— A. thelpteroides Ewz.— 

 Nephrodium noveboracense Desv. — Las- 

 trea noveboracensis J. E. Smith. 



II. — Lower pinnae little smaller than 

 those above. 



3>. THELYPTERIS A. Gray, Man ed 1, 

 630 (1848). 



Marsh fern; Snuff-box fern: Rtstock 

 slender; fronds 1-2° long, 4-6' broad, 

 lanceolate, pinnae mostly horizontal 

 linear-lanceolate; segs oblong, entire, 

 obtuse or appearing acute in fr from 

 the strongly revolute margins; veins 

 mostly forked, bearing sori near their 

 middle; indusia minute, smooth, naked. 

 New Brunswick; Manitoba; Kans; Tex; 

 Fla. Synonyms: Acrostichum thelyp- 

 teris E, sp PI 1071 (1853). — Aspidium 

 thelypteris Swz, Schrad J bot 1800 (2)- 

 40 (1801). — Polypodium thelypteris L. — 

 Nephrodium thelypteris Desv. — Lastrea 

 thelypteris J. E. Smith. 

 1>. PATENS Kuntze, Rev. Gen PI 2:813 

 (1891 ). 



Sweet fern. Rtstock rather stout, 

 bearing several fronds at growing end; 

 fronds 2-3° long, 4-10' broad, ovate-ob- 

 lbng. softly pubescent beneath; pinnae 

 closely placed, linear-acuminate, lowest 

 pair somewhat deflexed, all cut % of 

 way to midrib; segs num, acutish, basal 

 ones longest; veinlets evident, lowest 

 ones of adjoining segs oft uniting; sori 

 near margin; indusia very pubescent. 

 Fla; Ala; Cal. Synonyms: Polypodhim 

 patens Swz, Prodr Veg Ind Occ 133 

 (1788). — Aspidium patens Swz, Syn Fil 

 49 (1806). — A. molle Swz, Schrad J bot 

 1800 (2): 34 (1801). 



D. SIMULATA Davenport, bot gaz 19: 

 497 (1894), as syn. 



Me to Md; Mo. Synonym: Aspidium 

 simulatum Davenport, bot gaz 19:497 

 (1894). 



**Texture firmer or subcoriaceous, 

 veins forking freely. 



I. — Fronds pinnate; pinnae cut into 



spreading triangular lobes; sori conflu- 

 ent. 



X>. UK IT A Kuntze, Rev Gen PI 2:811 

 (1891). 



Stipes 1-1 y 2 ° long, brownish, naked; 

 fronds iy 2 ° or more long, 5-8' broad; 

 pinnae narrow, cut from l-3d to hall- 

 way down into sharp, pointed lobes; 

 lower pinnae not reduced; veins pinnate 

 in the broad lobes with 6-8 veinlets on 

 each side, lower ones of contiguous 

 groups united; sori near ends of veins 

 principally in lobes. Fla. Synonyms: 

 x J uiypoaium unitum L, Sp PI ed 2, 1546 

 (1764). — Aspidium unitum glabra Mett, 

 Ann Mus bot Ludg Bat 1:230 (1863-4), 

 not A. glabrum Mett (1856-8). 



II. — Fronds bipinnatifid or bipinnate; 

 indusia rather large; segs not spinulose. 

 A. — Fronds small, narrowly lanceolate. 

 D. FRA6-KAKS Schott, Gen Fil 1834 



Fragrant fern. Fronds 4-12' hi, gland- 

 ular and aromatic; pinnae linear-oblong, 

 pinnately parted; segs toothed or nearly 

 entire, nearly covered beneath with very 

 large thin imbricate indusia, which are 

 orbicular with a narrow sinus, margin 

 ragged and sparingly glanduliferous. 

 Labrador; Alk; NY; Wis; Minn; Vt; NH; 

 Me; Greenland. Synonyms: Polypodium 

 fragrans L, sp PI 1089 (1753). — Aspi- 

 dium fragrans Swz, Schrad J bot 1800 

 (.2):35 (1801). 



II. — AA. — Fronds larger, mostly 2-4° 



hi. 



(1). Fronds bipinnatifid or nearly 

 twice pinnate; indusia large, thinnish 

 and flat. 



D. FLOBIDANA Kuntze, Rev Gen PI 2: 

 812 (1891). 



Stipes 6-10' long, sparingly clothed 

 with ovate scales; fronds lanceolate, 

 18-20' long, 5-8' broad; fertile pinnae 

 confined to upper half of frond, nar- 

 rowly lanceolate, cut down to narrowly 

 winged secondary rachises into oblong, 

 distinct pinnules; sterile pinnae broader, 

 shorter, and sub-deltoid below, less deep- 

 ly cut. Fla; Ala. Synonyms: Nephro- 

 dium floridanum. Hooker, Fil Exot t 99 



(1859) . — Aspidium floridanum D. C. 

 Eaton, in Chapman's Fl So US ed 1,595 



(1860) . — A. cristatum floridanum Hooker. 

 D. CRIST AT A A. Gray, Man ed 1, 631 



(1 Cres't fern; Crested shield fern. Fronds 

 linear-oblong or lanceolate in outline, 

 1-2° long; pinnae short, 2-3' long, tri- 

 angular-oblong or lowest nearly trian- 

 gular, deeply pinnatifid; segs 6-7 pairs, 

 finely serrate or cut-toothed; son as 

 near midvein as margin; indusia smooth, 

 naked. Can; Ark; Id; Nebr; Va. Synon- 

 yms: Polypodium cristatum L, sp PI 

 1090 (1753). — Aspidium cristatum Swz, 

 Schrad J bot 1800 (2): 37 (1801).— A. 

 lancastriense Spreng.— Nephrodium cris- 

 tatum Michx. — Lastrea cristata Presl. 

 Variety CLINTONIANA Underwood, Our 

 Native Ferns, ed 4, 115 (1893). 



Fronds much larger, 2y 2 -4° long; pin- 

 nae oblong-lanceolate, broadest at base, 

 4-6' long, 1-2' broad, deeply pmnatihd; 

 segs 8-16 pairs, crowded or distant, lin- 

 ear-oblong, obscurely serrate; veins pin- 

 nately forking, bearing sori near mid- 



