FELL^EA. 
19 
more heart-shaped ; rachis finely pubescent and almost glandular. 
San Diego (California), Arizona, New Mexico, Rare. 
44- P. pulchella, Fee. (The preUy P.) 
Rootstock very short. Frond quadri-pinnate at base, triangular- 
ovate; final divisions ovate-heart-shaped, obtuse, 1-12 to 1-4 inch long, 
always stalked, smooth, edges often much rolled up; involucre thin. 
Rachis and all its divisions black, polished. 6 to 18 inches high, (^Al~ 
losorus , Mart. & Gal.) 
^ New Mexico to Peru. 
divisions very sharp-pointed or prickly. 
45. P. ternifolia, Link. (The P. with leaves divided in threes.') 
i'ronds pinnate; lower pinnae three-parted. 
May occur in Texas or Arizona. Mexico to Peru. 
-w- Rootstock short and thick. Frond bi-pmnate, smooth ; fertile pinnules 
rolled up to the midrib. 
46. P. Wrightiana, Hooker. (The P. dedicated to Wright.) 
Pinnules spreading, not exceeding six pairs; sterile ones broadly 
oval, nearly ^ inch long, rounded or heart-shaped at base, obtuse but 
with a minute, sharp point or prickle. Fronds lanceolate. Scales on the 
rootstock dark-brown. 8 to 12 inches high. {F. mucronata, Baker; F. 
Weddelliana, Fee.) 
Colorado to Texas, Arizona and California. 
47- P. bradiyptera, Baker. (The small fern.) 
Pinnae very short, often broader than long, ascending or pressed close 
to the rachis; pinnules 5 to 13 to each pinna, to inch long, crowded; 
frond narrowly oblong-linear. Scales on the rootstock rusty, toothed. 
12 to 18 inches high. (^F. Ornithopus^ var. , Eaton.) 
Sierras, California, Rocky places. 
^Fronds tri-pinnate (in well developed plants). 
48. P. Ornitliopus, Hooker. (The bird footed Y .) 
Fronds very stiff; pinnae linear, lower ones often fz the length of 
the frond ; pinnules with 3 to 7 divisions, not exceeding inch long, 
margins rolled up to the midrib, the rare sterile divisions four-sided. 
Rootstock very thick and short. 
Dry, rocky hillsides; throughout California, especially near the coast. Guadalupe 
Island. 
49. P. densa, Hooker. (The close-set P.) 
Rootstock slender, branching, tangled. Frond ovate, to 2^ 
inches long: final divisions inch long, linear-lanceolate; fertile entire, 
sterile sharply toothed; margins slightly recurved: involucre light- 
colored. Usually very small, growing at high elevations. (^Onychmm 
, Brackenridge.) 
Utah and western Wyoming to California and Oregon. Rocky places. 
*** Fronds leathery ; veins hidden; final divisions broad and fiat; im>o- 
lucre very narrow. 
50. p. Bridgesii, Hooker. {^Bridges' P.) 
Fronds pinnate; pinnae mainly opposite, sterile ones round, at first 
