193 



245 



way down into entire, acute or subobtuse segments; upper basal segment of lower 

 pinnae generally a little prolonged and close to the rachis, the lower basal one 



shorter and remote from rachis. 

 Veins simple, 14 — 16-jugate, of- 

 ten prominent on the upper 

 side, the basal pair connivent 

 to sinus. Sori medial; indusium 

 small, deciduous, setose. Spo- 

 rangia glabrous. 



wfew 



Fig. 38. D. lugubris (Kze.) C. Chr , leg. Pohl. Pinna X 'U 

 and segments seen from bothi surfaces, X I'Is. 



The typical 

 form of Ü. lugu- 

 bris here described 

 is rather common 

 in Southern Bra- 

 zil. It was refer- 

 red to Nephr. te- 

 tragonum by Ba- 

 ker in Flor. bras, 

 which also inclu- 

 des our D. scabra, 

 from which spe- 

 cies it differs in pubescence and size. I have seen the following specimens: 



Minas Geraes: Caklas, Mosen nr. 2157, 2159 (Rg', 21(10 (H, Rg) ; G. A. Lindberg nr. .558 (B); Regnei.l 

 nr. HI 1450c (Rg) — Lagoa Santa, Wakming iH). — Sao Paulo: Serra de Caracal, Mosen 

 nr. 2158 (Rg, S) — Matto Virgem, Rio Claro, Löfgren nr. 652 (HI. 



In some of these typical specimens the hairs of the surfaces sometimes are 

 stellate; therefore I refer the following form as a variety to D. lugubris. 



Fig. 39. D. lugubris var. devolvens (Rak.). Basal pinnæ X *\b and segments 

 seen from both surfaces, X l'lä (Glaziou 15766). 



var. quadrangularis (Fée). 



Syn. Aspidium quadrangulare Fée, Cr. vase. Brés. 1: 145 tab. 50 fig. 2. 1869. 



Rio, Glaziou nr. 962 (Herb. Cosson, Paris, H). 



Underside of lamina throughout like rachis and costæ above densely greyish 

 puberulous by stellate hairs. The lower 3 — 4 veins run to sinus. Scales fewer. 

 Otherwise typical. 



D. K. U. Vldcnsk. Selsk. SUr.. 



R;ekke. nalurvideiisk. og matheni. Afd. X. 2. 



32 



