-12 



CON T HI CUT IONS FROM THE NATIONAL HE KHAR I I'M. 



spicuous mammiform basal protuberance; veins tolerably close, once-forked, evident 

 upon the lower surface; sori continuous along both margins almost to the serrulate 

 apex, the indusium nearly 1.5 mm. broad. 



Type in the U. S. National Herbarium, nos. 520162, 520163, and 520164, these 

 comprising a fertile frond and rhizome of a plant collected in the vicinity of Holly- 

 mount, Mount Diablo, Jamaica, altitude about 750 meters, by William R. Maxon 

 (no. 2253), May 25 to 27, 1904; sheets no. 520105 and 520166 comprise a sterile frond 

 with identical data. The plants grew at the border of the forest, depending grace- 

 fully from a bushy bank along the trail. Mr. Harris's no. 8882 and Dr. Underwood's 

 no. 3458, both collected in this vicinity in 1905 and 1906, respectively, are the same. 



In its vascular parts and chaffiness P. purdoniana resembles P. longifolia, of which 

 very likely it is a derivative. It differs in a pronounced way, however, in its enor- 

 mous lax arcuate fronds and especially in the falcate articulate pinna?, as described. 

 Except with great care the pinnte are deciduous in drying, separating very readily 



Figcre l.—Pteris purdoniana. Characteristic fertile and sterile pinnae of type. Natural size. 



at the point of insertion, a-! shown in the accompanying figure, which has been kindly 

 furnished by Dr. II. D. House. 



Named in honor of W. P. Purdon, esq., of Kingston, Jamaica, by whose kind per- 

 mission the writer was enabled both in 1903 and 1904 to explore the vicinity of Mount 

 Diablo, working from Hollymount, Mr. Purdon's country estate, as a base. 



MISCELLANEOUS NOTES. 



Elaphog-lossum siliquoides (Jenm.) C. Chr. Ind. Fil. 315. 1905. 



Acrostichum siliquuldcs Jenm. Journ. Bot. 19: 53. 1881. 



This species, well described by Jenman upon Jamaican specimens and known pre- 

 viously only from that island, was collected at two localities in Alta Verapaz, Gua- 

 temala, by the writer in 1905: Above Sepacuite, on the trail to Panzos, Maxon &■ II ay 

 3109; Secoyote, near Sepacuite, on rotten stumps, Maxon & Hay 3248. These agree 

 perfectly with Jamaican specimens (Maxon 1921 and 22721, from Hollymount, alti- 

 tude about 750 meters. 



Polypodium fissidens Maxon, Coatr. Nat. Herb. 8: 275. pi. 61. f. 4a. 4b. 1903. 



This well-marked species, described originally from Chiapas, Mexico, may now be 

 reported from Guatemala on the basis of Selers's no. 2365, collected in the Sierra 

 Santa Elena, Department of Chimaltenango, at an elevation of .3,000 meters— the 

 specimens received from Captain Smith. 



