IO 



FIELD COLUMBIAN MUSEUM BOTANY, VOL. III. 



Stipes 25-50 cm. long. Fronds 25-30x16-19 cm,, fruiting pin- 

 nules 2x9 cm. 



Hab. Rocks and rock walls in cool situations. Cenote" de 

 Sacalun, Schott 631 ; common on the walls of a cenote" twelve miles 

 east of Izamal, Gaumer 995 ; and on the north wall of a dwelling on 

 the outskirts of Izamal, Millspaugh, PI. Utowance. This fern is also 

 occasionally seen in cultivation, Gaumer 993- 



Goniopteris rep tans (Sw.) Presl. 



Poiypodium reptans Sw., Aspidium reptans Mett. 



Frond pinnatisect, stellate-hairy above, lax 2-3-forked-hairy 



beneath; segments alternate, 

 ovate, blunt, more or less regu- 

 larly crenate or repand, sub- 

 truncate at the short petiolulate 

 equal base; veinlets simple, the 

 lowest pair anastomosing and 

 projecting a veinlet to the sul- 

 cus; rachis filiform. Sori scat- 

 tered, 3-5 to each segment; 

 sporangia lightly anastomose- 

 veined; spores ovoid to phaseo- 

 loid, marked by two lines of dis- 

 tinct beads passing around the 

 longitudinal axis. 



Fronds 14-22 cm.; seg- 

 ments 1.5-2.3x1.3-1.5 cm. 



Cenote" of Uayama, Schott 



Plants caepitose or decumbent. 

 Hab. Moist rocks, in shady places. 

 779; in a cave near Calcehtoh, Stone 264.. 



Poiypodium polypodioides (L.) Hitch. PI. Baham 156. 



Acrostichumpolypodwides Linn. , Poiypodium incanum Sw. , Marginaria 

 incana Presl , Lepicystis incana Sw. 



Fronds low, the stipes rising 

 from a slender, scaly, running root- 

 stock, coriaceous, grayish beneath 

 from a dense covering of scurfy, 

 peltate, laciniate scales; simply 

 pinnatifid, the segments oblong- 

 linear, obtuse. Sori small, situ- 

 ated in deep pits near the margin 

 of th^ segments. (These pits are 

 readily seen with the naked eye, after 

 scraping off the scales.) Sporangia 

 nearly circular in outline, finely few- 

 anastcr.iose- veined; spores phaseo- 

 loid, hyaline, unmarked. 



Stipes 3-6 cm. Fronds 6-10 

 x2.5~3 cm. 



Hab. On trees, in deep woods, infrequent: On the branches 

 of Lysiloma latisiliqua, at Buena Vista Xbac, Gaumer mo. 



