i>A\ ALLii:,i: — m;i'iik<>i.i;i'is. 47 



Bonfjuot, Lofier (altitiulo, 2,500 m.), h'lmcr G507 (form witli vcrj- chaffy 

 stipe and raoliis), (ir)2S (vorv lax, serrato form, in moist ravines), 

 Topping 2.J1 ; Nuova Kcija, Merrill 240; Arayat, SOO m., Lolicr ; Marivoles 

 1,300 m., Merrill 323(i. 



Pantropic. 



(2) N. exaltata Sciiott. Stipes tiifti-d, 10 to !."> em. Iii;.'li, naked or 

 sliglitly scaly; fnmds .10 cm. or more lonp, about 10 cm. broad; pinnir 

 close but not ind)rieate, tiie fertile linear, acute, usually sul)falcate, 

 sterile shorter ami less acute, base rounded on the lower side, auricled 

 on the upper, entire or nearly so, suhcoriaceous, neaily ;rh»lirous; soii 

 submurfjina! ; indusium reniform with a deej) sinus. 



.Sorsogon, Baranda ; Rizal, Loher, Marave. A form with repeatedly 

 diehotomous pinnules is rnmmnn in cultivation in MMiiila. 

 Pantropic. 



(3) N. hirsutula I'lcsl. Like A', exaltata, except that botli surfaces 

 of the pinnu', and es|)eeially the rachis, are downy. 



Pataan Island. linraiida : Benguet and Manila, Lolirr ; cultivated in 

 Manila. 



(4) N. volubilis •!. Sm. Rhizome scandent indefinitely, naked, pale 

 brown, wiry, beariiifr small clusters of fronds at the ends of very short 

 branches; stipes about 10 cm. long, firm, naked or nearly so; fron<ls 

 25 to 50 cm. long, 4 to 6 cm. broad, the rachis firm, sparsely chaffy on 

 the back; pinnte about 5 mm. broad, very obtuse, nearly entire, rounded 

 on the lower side at the base, ol)scurely auricled on the upper, coriaceous, 

 glabrous, or the costa minutely squamulose above; sori near the margin; 

 indusium reTiiform witli a deep sinus. 



Luzon, Cumiuf] 37; Negros, Cuming 34G; Davao, Copeland 420, common 

 sterile in low thickets. 

 Himalayas to Xew (Uiinea. 



(5) N. acuta Presl. Rhizome very short, erect, with scaly props; 

 stipes tufted, stout, 30 to 80 cm. high, squamulose at the base, glabrescent 

 above; fronds 80 to 120 cm. high, 30 to 40 cm. broad; pinna> 15 to 25 

 mm. broad, separated by less than their own breadth, acute, cuneate or 

 more abruptly contracted at the base, sterile entire, fertile obscurely 

 crenate, herbaceous or suhcoriaceous, glabrous or nearly so; sori almost 

 as near the costa as the margin; indusium becoming orbicular by the 

 meeting of the two broad basal lobes. (Includes X. macrophylla Presl.) 



Luzon, Cuming 22, Steere; Benguet, Loher (altitude, 2,250 m.), Elmer 

 0145; ^fanila, Warburg, Marave; Tayabas. Warburg: Sorsogon, Jiaranda ; 

 Paragua, Merrill 725; Basilan, DeVore and Hoover- S6; Davao. Warburg 

 12757, Copeland 365, 029. 



Pantro])ic. 



(6) N. rufescens Presl. Caudex erect, stout, with numerous braces, 

 coated with small black, appressed scales; stipes 20 to OO cm. high, firm, 

 brown, glabrescent; frond GO to 100 em. high; pinnie 10 to 15 mm. broad, 

 acute, sterile entire, fertile more or less .serrate, broadly rounded at the 

 base on the lower side, the upper usually prominently auricled, herbaceous. 



