498 »NTRfBUTION8 FROM THE NATIONAL HERBARIUM. 



from Martinique, h Is, on 1 1» i » basis, a species unknown to the writer and is 

 perhsps si in to be rediscoi ered. 



Dryopteris johnstoni Maxon, BD. DOV. 



Fronds few, 90 to 90 cm. long, borne closely from a slender creeping w i\ 



rhisome 6 to 7 mm. thick bearing a few stool cordlike roots about l mm. In 

 diameter; stipes 66 to 80 cm. long, In color dull yellowish, somewhat polished 

 beneath a minute Inconspicuous stellate pubescence, quadrangular and deeplj 

 sulcate in drying, bearing at the base a few yellowish brown, ovate or oblong- 

 ovate scales which are noticeably Btellate-pubescent ; lamina glabrate, broadly 

 deltoid. 27.5 to '-"•' cm. long, 20 to - 1 cm. broad, i<» to 12-jugate, decreasing 

 rather abruptly toward the apei Into a narrow elongate terminal bauds to 

 n cm. Long, deeply plnnatlfld below, the apex entire; rachls relatively Blight, 

 subflexuose; pinna? opposite or eery nearly so, Bubcorlaceous, sessile, linear* 

 lanceolate, caudate, the midvein elevated, especially below, with a few short 

 minute Blmple hairs, reins apparent; the lowermost pinna; 11 to n cm. long, 

 1.5 i" -.- cm. broad, strongly deflexed, greatly reduced at the base (particularly 

 on the lower side), broadest In the middle, uniformly lobed one-half the dis- 

 tance to the rachis or Blightly more, the apex long-attenuate, entire, the lobes 

 dose, about l'ii pairs, Blightly oblique, Bubfalcate, rounded, those of the lower 

 side largest I i."> nun. broad), with '.• or i" pairs of simple relnlets of which 

 commonly only the two lowermost pairs extend to the sinus: succeeding pinme 

 similar, differing mainly in the smaller size, shallower lobes and less reduced 

 bases of the pinna 1 , the middle and upper pinna' being broadest at the base 

 and decidedly falcate toward the extremity: BOri of the larger i inferior i lobes 

 about 9 pairs, relatively large, medial or nearly so: LndUSia Ann, reddish, even- 

 tually deciduous, bearing numerous simple whitish hairs mostly at the margin. 



Type in the U. S. National Herbarium, no. 582013; collected at an altitude of 



-tr.o meters on the Juan Griego trail, island of Margarita, Venezuela, July 22, 

 1908, by J. B, Johnston (no. 192). 



Known also from Trinidad, as shown by a specimen from the Jenman her- 

 barium it'. S. National Herbarium, no. 428910), and a second sheet representing 

 Feiidler's no. 54 (TJ. S. National Herbarium, no. 50241 ). the latter bearing the 

 following note attributed i" I >. C. Eaton: "Perhaps the Nephrodium deflexum 

 J. Smith, referred to in | Hooker and Baker's] Syn. Til. p. 292." The reference 

 is to a note by Mr. Baker, under Nephrodium refractum Hook., as follows 

 Fern gathered In Trinidad by Aldridge, A. deflexum, J. Sm. mss.. has similarly 

 deflected pinme, but they are narrower, and the lobes reach halfway down t<» 

 the midrib."' This description, if it may be called such, applies to the plant in 

 hand: but Smith's name is Invalidated by Nephrodium deflexum Presl, 1825. 



The relationship of i>. johnstoni is not with D. refracta (Flsch. & Meyer) 



Kuntze. which, as represented by several specimens in the National Herbarium. 



is of the section Cyclosorus. in gross characters it may be compared rather 



with I), faldculata (Raddi) Kuntze. from Brazil, the West Indian I), pyrami- 

 <i<u<i (Fee) Maxon. and the British Guianan />. latiuscula Mason. I>. fald- 

 culata is a plant with delicate herbaceous ovate fronds, very deeply cut non- 

 caudate glandular pinna', spaced segments, etc. /'. pyramidata ami />. imi- 

 uscula differ in their broader scarcely caudate pinme, uoncaudate apex and 

 marked pubescence, and in having the lower pinnae not deflected. 

 Dryopteris latiuscula Maxon, sp. nov. 

 Aspidium {Nephrodium) wardianum Jenman. in herb. Not Aspidium wardii 



Kuhn. ~lsVJ = x< p/inx! iiim wardii Baker, 1874= Dryopteris wardii Kuntze, 



1891. 

 Rhizome lacking; stipes 35 cm, long, light brownish, stout, deeply and Irregn 

 larly sulcate. with a thick scurfy covering of minute whitish stellate halra 



