ei . 
at distances of 2 cm, at right angles to the rachis of the pinna, the lower ones 
generally curved backwards, 5 cm long, 11/2 em broad, the edges parallel below the 
acuminate apex (in type-sp. acute), the basal ones, the first of which being the 
basiscopic one, shortly petiolate and triangular in outline, the middle ones sessile, 
the upper adnate with the posterior base, the uppermost ones decurrent and con- 
fluent, all, the uppermost excepted, pinnatifid nearly to the midrib or fully pinnate 
at base. Tertiary segments 10—12-jugate, a little oblique, 8—9 mm long, 3—4 mm 
broad throughout, obtuse or subacute (in the type-sp. the apex is more bluntly 
rounded on the lower side), the margins toothed with about 4 oblique or subfal- 
iB 
& & 
3 & 
& SS, 
esart 
\e \) ASX) 
QE Se ay 
Fig. 10. Scales from the midrib of se- 
Fig. 9. D. ampla (Willd.) O. Ktze. 
Typical secondary pinnules, nat. condary pinnulze beneath. a. D. ampla; 
size, and segments >< 2. b. D. excelsa, c. D. equestris; d. D. eque- 
stris var. heterolepis. 
cate, subacute teeth on each side; basal segments of larger pinnulz pinnatifid, most 
deeply so on the lower side. — Rachis scaly like the stipe, the lanceolate, reddish- 
or yellowish-brown, glossy scales especially numerous and accumulated in the axils 
and on the stalks of the pinne; these scales are flaccid, cordate at base hair-pointed, 
the margins somewhat lacerato-ciliate, their cells mostly rectangular with concolorous 
walls excepting those of the cells that surround the base, which are thicker and. 
darker; (in the type-sp. these scales are more reddish-brown and larger than in 
P. Sloanei); the furrow of the rachis above is under the scales densely pubescent 
by short, red, articulated hairs. Midribs of pinnz and pinnule above rusty-pubescent 
by short Ctenitis-hairs intermixed with some few, small scales, the midribs and 
7 dos 
