1050 POLYPODIACEAE 



r 



4. C. Eatoni Baker. Scales of the rhizome mostly with dark broxvii or black- 

 ish centers; fronds tufted, 6-38 cm. long; blades oblong-lanceolate, tripinnate; 

 pinnae ovate-oblong; stipes and primary and secondary rachises chaffy, with 

 white or pale rusty, imbricate, sub-appressed, lanceolate to linear scales; tomen- 

 tum consisting of long slender ribbon-like hairs ; ultimate segments about 1 .5-2 

 cm. long, the termmal one often twice larger; indusium continuous around the 

 pinnule, slightly membranous at margin. Rocky places: Utah— Ark.— Ariz.; 



15. NOTHOLAENA R. Br. 



Small ferns, with pinnately compound fronds lacking proper indusia and 

 ahnost always farinose, hairy or chaffy on the under surface. ^ MaS of the 

 blade sometimes mflexcd at first over the sporangia. Sori roundish or oblone 

 marginal, borne near the ends of the free veins. uuioug, 



Blades tomentose. not farinose beneath. , at p„,.,.„. 



Blades wlutish-farinose beneath, not hairy. ■™- ^'^'^'^V^- 



Kachises divaricate-flexuose. o v jr^r,^;„rv 



Racliises straight or nearly so. not divaricate-flexuose. 3, n. nivea 



•iu' ^' ^^^^-?; ^- ■^**- Scales of the rhizome dark reddish brown, mostlv 

 with narrow blackish midribs; fronds tufted, 4-26 cm. long; stipe and rachises 

 dark reddish or purphsh brown; blades oblong-lanceolate, tripinnate; ultimate 

 segments roundish obovate, 2 mm. broad, crenately incised, densely coated on 

 tlie upper surface with tangled, whitish or pale tomentum, and on the lower 

 surtace with hght brown tomentum; tomentum consisting of slender articulated 

 hairs. On rocks: Cahf.— Utah— Ariz. Son. 



r..J: f^' ^®^i^l®/ J ^^i"^^?.-o ^""^^^^ °^ ^^^*^ rhizome bright reddish browTi, one-col- 

 ored, tronds tufted, 7.5-23 cm. Ion?: stinps anrl mnhiaoc rtar-i- K.^,„„. ui,,.].^ 



Soti. — Mont. 



Ariz 



tufted 



t'A ^Q on^®^ ^f ^^- ^.^^^^^ ^^ \^^ rhizome reddish brown, one-colored, fronds 

 t%^'i-::^-.^^E'}^Zi^'^L'^^^^^^^ brown or black; blades ovate. 



iVT^^r^^.f + • 1 ^' .^""^ , . racnises dark brown or black; blades ovate, 

 lanceolate, triangular-ovate or deltoid, 3-pinnate; pinnules long-stalked; ultimate 



Infr'tf ' f ' • T^ '™?°*** °^ ^^^« "PP«^ ^^••f^'^^' ^o^i^^i^h. Nearly as' broaTas 



On mckt nIT k"v7 ^""W' '^^/'' ""' ^-1"^^'^; ^^'•^ °ften d'escending the veins. 

 Un rocks. Utah— ^.M.— Ariz.; Mex. and S. Am. Son. 



16. POLYPODIUM [Tourn.] L. Polypody. 



cJo/k™^ varying in size and habit. Fronds entire to pinnately compound 

 Son borne on the backs of the fronds, round to elliptical, non-indisiat™ dorsal 

 or terminal on the free or anastomosing veins, the ^4ins free in ^ur species 



stramin^o^^'T/Z^ ^fe™± ,?i^?T.^«. ^^^d, liquorice-like, chaffy; stipes 



6-20 cm. long.- 2.5-4 



segments 



t5) 



deeply 



;,,^+ «u XL r/ x-""-"--, — j-j-x^v..-^.^ vixijjLi^ai wi avjiutvMiuL suatuiate, narrowest 

 ir^Lf "^^ *5^ often dilated base, broadly romided at apex, obscurely or evidentlv 

 crenate; under surface slightly glandular; veins 1-3 tiiiies forked; sori large 

 medial, on the ends of the veinlets. B.C.— S.D.—N.M.—Aiiz.— Wash 



Family 3. MARSILIACEAE. Marsilia Family. 



with 



stalked leaves borne on a creeping rhizome. Sporocarps containing both 

 macrospores and microspores, borne on peduncles attached to the lower 

 parts of petioles or to the rhizome close to them. 



1. MARSILEA L. 



Majsh or aquatic plants commonly growmg in shallow water, with their 

 leaves floatmg on its surface. Leaves 4-foliolate. Sporocarps crustaceous, ovoid 



