31. PTERIS, § F.UPTERIS. 153 



or more I., 4-G in. br., lanceolate-deltoid ; pinnae lanceolate-deltoid, erecto-patent,. 

 with a straight rachis, the lower ones slightly branched at the base ; segm. on 

 short stalks, oblong or ovate, rounded or cordate at the base, |-1 in. 1., half as 

 broad, the jioint hlinit ; texture subcoriaceous ; rachis pubescent and both 

 surfaces sliubtly so; veins not visible ; sori in broad marginal lines which soon 

 hide the invol.—llk. Sp. 2. p. 148. Allosorus, Hk. Bot. Mag. t. 4(!92.— ;8, P. 

 jlexuosa. Link ; rachises zigzag, the pinnaj and pinnl. spreading at right angles 

 or even defiexed.— ///[-. *S>. 2. p. 148. Pteris, Hk. Ic. PL 2. t. 119. 



Hab. Mexico and New Mexico southward along the Andes to Peru. — The two vari- 

 eties seem often very different in habit but, it is impossible to drawthe line between them. 

 Mr. J. Smith also admits as distinct Pteris saglttata, Cav., in which the segments are 

 somewhat narrowed towards the point. 



§§§§ Holcochlpena, Baker. Texture and involucre of Platyloma, from which 

 thet/ differ only by the reticulated venation. Sp. 41-42. 



41. P. (Holco.) Burkeana, Baker ; st. tufted, 4-6 in. 1., naked, flexuose, polished, 

 nearly black ; fr. 8-4 in. 1., 2 in. br., with several pairs of simple, entire, short- 

 stalked upper pinnce, which are 1-]^ in. 1., j in. or more br., quite entire, 

 rounded at the base, blunt at the point ; lower pinnce slightly compound ; rachis 

 and both surfaces naked ; costce black and polished in the lower part ; texture 

 coriaceous ; veins copiously anastomosing ; sori quite continuous round the 

 margin of the pinnl., broad and ultimately hiding the reHexed involucre. — 

 Pteris, Bk. Sp. 2. p. 213. t. 126. B. Pteris dura, Willd., oldest name. 



Hab. Cape, Angola, Mascaren and Comoro Isles. 



42. J*. (Holco.) angulosa. Baker ; st. 6-12 in. 1., strong, erect, naked, 

 polished, dark chestnut-brown ; //•. 6-12 in. 1. each way, subdeltoid, bi- or tripin- 

 nate ; npper pinnce stalked, simple, cordate-ovate, 1-1 j in. 1., |-| in. br., the 

 margin nut tootbed but sometimes undulated ; lower pinnce lanceolate-deltoid 

 with several similar phuil. ^ in. or more apart, sometimes again compound 

 below ; texture coriaceous ; rachis hairy ; both surfaces naked ; vehis copiously 

 reticulated ; sori continuous to the apex of the segments, ultimately concealing 

 the reHexed involucre. — Pteris, Borj/. Pteris articiilata, Kaulf. Hh. Sp. 2. p. 

 214. t. 126. A. 



Hab. Mauritius, Bourbon, and Madagascar. 



Gex. 31. Pteris, Linn. See page 478. 



Sori marginal, linear, continuous, occupying a slender filiform receptacle in 

 the axis of the involucre. Invol. the same shape as the sorus, usually mem- 

 branous, at first quite covering it, at length more or less spreading. A large 

 cosmopolitan genus, including plants of almost every kind of division and venation. 

 Tab. III. f. 81. 



§ Eupteris. Veins all free. Stems ccespitose, involucre single. Sp. 1-39. 

 Tab. III. f. 31. a. b. 



* Integrifolice. Lower pinnce linear, undivided. Sp. 1-3. 



1. P. lonpifolia, L. ; st. 6-12 in. 1., stout, erect, pale, more or less clothed 

 below with pale-brown linear scales ; fr. 1-2 ft. 1., 4-9 in. br., oblong-lanceolate, 

 attenuated below ; pinnce sessile, often 20 to 80 on each side, 8-6 in. 1., ^-§ in. 

 br., linear, entire, truncate or cordate or sometimes sliglitly auricled at the base ; 

 texture subcoriaceous ; rachis naked or slightly scaly below or throughout, both 

 surfaces naked ; veins close and fine, usually once branched ; invol. membranous, 

 yellowish-brown. — Hk. Sp. 2. p. 157. 



u 



