266 Broadhurst: Struthiopteris in North America 



writers with Lomaria Plumieri Desv. The broad, horizontal 

 pinnae pictured in the type of exaltata separate it positively from 

 Plumieri with its narrow, falcate pinnae, pictured by Plumier. 

 L. mucronata, which Christensen refers to Plumieri, is much 

 nearer exaltata. Fee, in this, as in several other original descrip- 

 tions, makes contradictory statements regarding the size. This 

 mistake led to two others: (i) the publication of L. Feei as a 

 distinct species; and (2) the placing of L. exaltata under L. VHer- 

 minieri as a variety. Christensen includes exaltata in VHer- 

 minieri; although the immature sterile laminae of exaltata some- 

 times resemble the mature ones of L Herminieri in proportion and 

 in the shape of the pinnae, they seem otherwise distinct. 



Four sheets from Grenada, collected by Sherring (October to 

 May, 1890-91) show young specimens, which are more delicate 

 in texture and bear pinnae which are shorter and more like those 

 of V Herminieri. The basal reduced pinnae are prominent, more 

 numerous, and contiguous. They are accompanied by taller but 

 immature fertile fronds; no mature sterile or fertile fronds from 

 the island have been seen. At present it seems best to leave these 

 Sherring specimens in S. exaltata. 



Three sheets from Costa Rica ("Forets de l'Achiote, Volcan 

 de Poas," altitude 2,000 m., Tonduz 1070Q) have laminae with 

 wider sinuses, and occasionally 2 or 3 pairs of semicircular lobes 

 at the base. The pinnae are proportionately as well as actually 

 narrower, and the fronds have an open appearance not really 

 characteristic of the species. Christ named them L. V Herminieri, 

 but they seem much nearer exaltata, especially in the shape of the 

 lamina and of the pinnae. Maxon's no. 5671 (humid forests of 

 the upper Caldera watershed, between "Camp I" and the Divide, 

 Holcomb's trail, above El Boquete, Chiriqui, altitude 1,650- 

 1,925 m.) has pinnae which are more curved; Maxon's no. 5427 

 from the same region (humid forest around Los Siguas Camp, 

 southern slope of Cerro de la Horqueta, Chiriqui, altitude about 

 1,700 m.) has wider sinuses in the lower part of the lamina, and 

 the vestigial pinnae are much more prominent than in the other 

 specimens seen. 



3. S. jamaicensis Broadh. sp. nov. 



Plant terrestrial. Rhizome ascending, 24 cm. long (in the one 



