ae 
Lastrea rhizomate erecto, 2—3 cm alto 1 cm crasso, radicibus numerosis, ra- 
mosis, apice paleis paucis brunneis, subrigidis, parvis (2—4 mm _ longis), breviter 
ciliatis instructo. Stipitibus fasciculatis numerosis, rigidis, 4—6 cm longis, supra 
canaliculatis et brevissime puberulis, subtus teretibus glabrisque, esquamosis. La- 
mina lineari-lanceolatis, 20—30 cm longa, medio 4—6 cm lata, coriacea, griseo- 
viridi, breviter acuminata, versus basin gradatim angustata, pinnata-subpinnatifida; 
rachi brevissime puberula, pilis patentibus, acutis. Pinnis numerosis (usque ad 
30—40 utroque latere), sessilibus, alternis vel suboppositis, divaricatis, linearibus, 
saepe falcatis, c. 4 em longis, 3—4 f 
mm latis, acutis vel breve acumina- 
tis, costis subtus minute puberulis 
exceptis  glabris, inferioribus 4—6- 
jugis  auriculiformibus; marginibus 
pinnarum crenatis vel plus minusve 
pinnatifidis, medio et pagina inferiore 
profundius incisis, parte tertia exte- 
riore saepe integra; segmentis obli- 
quis, apice rotundatis, basalibus duo- 
bus auctis, subacutis vel rotundatis 
(pinnis subbiauriculatis). Venis supra 
prominulis, furcatis vel simplicibus in 
parte integra pinne, in segmentis pin- 
natis, 4—5-jugatis, basalibus supra 
sinum marginem attingentibus. Soris 
submarginalibus, saepe marginibus re- 
volutis obtectis. Indusiis magnis,- brun- 
neis, reniformibus, hispidis. Sporan- 
giis glabris. Fig. 3. D. Shaferi Maxon et C. Chr. 
In general habit this species recalls Base and middle part of a leaf and a fertile pinna, 
D. sagittata by its narrow, hastate or sa- ioe cage 
gittate pinnze, several of which are nearly quite entire; the middle ones of larger 
_ leaves are scarcely incised halfway to the costa on the lower side that is usually 
more deeply cut than the upper one, the outer third of the pinnz is often quite - 
entire. In all essential characters D. Shaferi is, however, widely different from 
D. sagittata, but closely related to D. scalpturoides, differing from it mainly in its 
very narrow pinnz, which are less incised and glabrous above. 
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20. D. concinna (H. B. W.) O. Ktze. — Phegopteris adenochrysa Fée, Gen. 245 
(Martinique, Porto Rico) is certainly not D. concinna but probably the common 
D. opposita. 
3* 
