35 



broadest and spinulose-serrate, lower 

 pairs often cleft nearly to base, into 2 

 or 3 linear pinnules; veins fine, parallel, 

 simple or once forked; indusium pale. 

 Fla. 



P: SERRULATA L, f, Suppl PI 445 



(1781). 



Ribbon-fern, spider-fern, saw-leaved 

 bracken. Stipes 6-9' long:, naked, pale or 

 brownish; fronds 9-18' long, 6-9' broad, 

 ovate, bipinnatifid, main rachis margined 

 wiLh a wing- which is 1-2" broad at top 

 and grows narrower downwards; pinnae 

 in 6 or more distinct opp pairs, upper 

 ones simple, lower ones with several 

 long linear pinnules on each side, edge of 

 barren ones spinulose-serrate; veins 

 simple or once forked. Ala (Mohr) ; 

 Macon, Ga (Farnell); SC. Probably an 

 escape from cult. 



Section PAESIA St. Hilaire. Veins free, 

 rtstpck creeping, stipes subdistant, in- 

 dusium more or less double. See Pteri- 

 dium. 



FTEBIDIIHtfL Scop Fl Com ed 1, 169 



(1760). 



Section Palsia of Pteris. 

 P: AQI7XEXN1IM Kuhn in Deckins Rei- 

 sen III, Bot Ost-Afrika 11 (1879). 



Brake, Bracken, Eagle fern, Umbrella 

 fern, Hog brake. Rtstock stout, wide- 

 creeping-, subterranean; stipes 1-2° hi, 

 erect, stramineous or brownish; fronds 2- 

 4° long, 1-3° wide, ternate, the 3 

 branches each bipinnate; upper pinnules 

 undivided, lower more or less pinnatifid. 

 Newfoundland; Quebec to Ala; Mo; Man- 

 itoba. Synonym: Pteris aquilina L, Sp 

 PI 1075 (1753). 



Variety PSEUB-OCAUDATUM Clute, 

 Fern b 8:39 (1900), as syn. 



Long Island, NY, to Fla, Ala and Tex, 

 mainly near coast. 



Variety PUBESCENS Underwood, Our 

 Native Ferns, ed 6, 91 (1900). 



Fronds silky-pubescent or tomentose, 

 especially on under surface; otherwise 

 as type. Ar. Cal; Ut; BC. Synonym: 

 Pteris aquilina lanuginosa Hooker, and 

 American authors — not Bory, Willd, Sp 

 PI 5:403 (1810). 



P: CAUDATUM Maxon, US Na MU pr 

 3:631 (1901). 



Pinnules sometimes linear and entire, 

 nr with less crowded segs than P. aqui- 

 lina; terminal lobe linear and entire. NJ; 

 ^la; Tex. Synonyms: Pteris caudata L. 

 rp PI 1075 (1753). — Pteris aquilina cau- 

 data Hook. Sp Fil 2:196 (1858). 



Genus CHEILANTHES Swartz. 



Syn Fil 126 (1806). 



Sori minute, at ends of veins; indu- 

 sium continuous or interrupted. Near 70 

 temperate and tropical sp. 

 Section ADIANTOPSIS Fee. Indusia dis- 

 tinct, roundish, confined to apex of a 

 c ingle veinlet. 



rHEILANTHES CALIFORNICA Mett. 

 rheil 44. B 2:336. Da 20. Z 1:147. 2:131. 

 Greene, Cal ac b 2:415 Cruz. 



Rtstock short, creeping chaffy; stipes 

 densely tufted, dark brown, glossy, 4-8' 

 long; fronds 4' or less each way, broad- 

 ly deltoid-ovate, smooth on both sur- 

 faces, quadripinnatifid; lower pinnae 

 largest, triangoilar; upper ones gradually 

 smaller and simpler; ultimate segs lan- 



ceolate, acute, incised or serrate; indusia 

 membranous. Cal; Baja! SD Co! Syn- 

 onyms: Aspidotis Calif ornica Nuttal, 

 Hooker, Sp Fil 2:71 (1858) as syn. — Hy- 

 Hypolepis calif ornica Hook sp Fil 2:71 

 (1858). 



Lace fern. Southern and Baja Cal. 

 C: PRINGLEI Davenport, Torr cl b 10:61 

 t 34 (1883). Z 2:150. 



Rtstock slender, creeping, clothed with 

 linear-lanceolate scales; stipes IV^-^Vz' 

 long, r'ish or chestnut brown, scaly at 

 base and sparingly above; fronds 1-2 y 2 ' 

 long, nearly as broad, triangular or 

 ovate-deltoid, 2-3-pinnately divided into 

 5-7 pairs of pinnae, opp and spreading; 

 in the smaller sterile fronds, alt and 

 erecto-patent in the larger fertile fronds, 

 naked, dark-g; pinnae 5-eights to one 

 and one-eighth inch long, lower un- 

 equally deltoid or ovate, bipinnate, up- 

 permost oblong - , pinnate or deeply pin- 

 natifid; pinnules ovate or oblong, pin- 

 nately divided or cleft into oblique segs, 

 which are again deeply cleft into cuneate 

 strap-shaped divisions, those of largest 

 segs again deeply cut into narrow, ob- 

 tuse, cuneate lobes, recurved t ps in fer- 

 tile fronds forming distinct herbaceous 

 inv with entire or crenulate margins, 

 sori one to each ultimate lobe on apex, 

 of a free veinlet. Southeastern Ar (C. G. 

 Pring'le). 



Section E II CHEILANTHES. Indusia 

 more or less confluent, com extending 

 over apices of several veinlets, but not 

 continuous all round segs; segs mostly 

 flat, not bead-like. 

 *Segs of frond smooth. 



I. — Pinnae few, not more than 5-6 

 pairs. 



C: WRIGHTII Hooker. 



Stipes castaneous, slightly chaffy at 

 base, 1-2' long; fronds 2-3' long, ovate- 

 oblong-, 3-pinnatifid, segs more or less 

 incised; indusium subcontinuous or in- 

 terrupted, similar to frond in texture. 

 Tex; Ar. 



II. — Pinnae num. 



C: MIGROFEYLLA Swz. 



Rtstock short, creeping; stipes dark 

 brown, gclossy, rusty pubescent on upper 

 .side, 4-6' long; fronds 4-6' long, ovate- 

 lanceolate, 2-3-pinnate; pinnae lanceolate, 

 lowest ones com largest and more del- 

 toid; pinnules oblong or deltoid-ovate, 

 deeply incised or pinnate; indusium sim- 

 ilar in texture to frond, interrupted or 

 subcontinuous. Fla; NM. 

 C: ALAEAMENSI3 Kunze. 



Rtstock creeping, clothed with slender 

 brown scales; stipes bk with scanty fer- 

 ruginous wool; fronds 2-10' long-, nar- 

 rowly lanceolate, 2-pinnate; pinnae close, 

 ovate-lanceolate, lowest ones not en- 

 larged, com smaller than those above; 

 pinnules com acute, often auriculate on , 

 upper side at base; indusia pale, mem- 

 branous, interrupted only by the incis- 

 ing' of pinnules. Va; Ala; Tenn; Tex; 

 Ar. Synonyms: Pellaea Alabamensis 

 Baker. — Pteris Alabamensis Buckley, Am 

 J sci 45:177 (1843). 

 **Segs of frond glandular viscid. 

 CHEILANTHES VISCIDA Davenport. 

 Torr cl b 6:191. B 2:337. 



Stipes 3-5' long, wiry, bk'ish, chaffy at 



