2o8 44. NEPHEODIUM, § LASTREA. 



those of the barren frond the broadest ; lower pinnce small, deflexed ; veinlets 

 rarely forked, 6-10 on a side ; texture herbaceous ; racMs and both sides naked ; 

 sori sron confluent, in rows near the flat edge. — Mh. Sp. 4. p. 89. 



Hab. Canada and United States.— Habit of iV. Thelypteiis, from which it may be 

 known by its simple veins and reduced lower pinnae. 



49. N. (Last.) conterminum, Desv. ; st. densely tufted, 6-9 in. L, naked or 

 villose ; fr. 12-18 in. 1., 4-8 in. br., oblong-lanceolate ; centxaX pinnce the longest, 

 2-4 in. 1., \ in. br., cut down to the rachis into entire lobes about 1 lin. br., the 

 lowest lobes often enlarged, the lower pinnce decreasing gradually ; texture 

 herbaceous or subcoriaceous ; rachis naked or pubescent ; under surface often 

 slightly' villose and glandular ; veinlets 6-8 on a side ; sori submarginal ; invol. 

 minute, fugacious. — Hh. Sp. i. p. 91. 



Hab. W. Indies and Mexico, southward to Brazil, Chili, and Bourbon. — This, which 

 appears to be abundant throughout Central America, has the general habit of iV. The- 

 lypteris and noveboracense, with an erect caudex. We cannot distinguish clearly A, oUgo- 

 carpum, Kth., A. Lindeni, Kuhn, and A.pilosulum, Klotzsch. F^e makes of this a genus 

 Oochlamys, characterized by an involucre receding from that of typical Nepkrodium 

 towards A spidium, and enumerates seven West-Indian species. 



60. N. (Last.) ICaidfussii, Hk. j St. tufted, 4-6 in. 1., slender, slightly pubescent ; 

 /)■. lJ-2 ft. 1., 6-8 in. br., oblong-lanceolate ; pinnce 3-4 in. 1., -l-f in. br., cut 

 down nearly to the rachis into spreading, entire blunt lobes 2 lin. br., the 

 lower lobes not enlarged and lower pinnae dwindling down gi-adually ; texture 

 herbaceous or subcoriaceous ; rachis and under surface finely pubescent ; veinlets 

 about 6 on a side ; sori medial ; inwl. fugacious. — Hk. Sp. 4. p. 97. 



Hab. West Indies to Brazil. — This differs from the last by its broader lobes and medial 

 sori. Both Metteniua and Grisebach unite it with oligocarpum. 



51. N. (Last.) concinnum, Baker ; rhizome wide-creeping ; st, 6-12 in. 1., 

 naked or slightly pubescent ; fr. 1-2 ft. 1., 6-8 in. br., oblong- lanceolate ; pinnce 

 3-4 in. 1., |-1 in. br., cut down nearly to the rachis into spreading or falcate 

 entire lobes ^ in. br. ; texture^ subcoriaceous ; rachis and under surface slightly 

 villose ; veinlets 6-8 on a side ; sori submarginal ; invol. minute, ciliated,, 

 fugacious. — Polyp. Willd. 



Hab. Mexico to Chili. — This may be best known from the two preceding by its creeping 

 rhizome. A. rivulorum, Link, is said to differ by its medial sori, and the presence of a 

 gland at the base of the pinnse beneath ; and Pheg. adenochryaa, Ffe, may be this without 

 an involucre. 



52. N. (Last.) Sprengelii, Hk. ; st. 6-12 in. 1., stramineous, naked or slightly 

 pubescent ; fr. 2-4 ft. 1., often 1 ft. br. ; pinnce 6-8 in. 1., 1 in. br., cut down 

 nearly to the rachis into entire lobes 1-1^ lin. br., the lower ones with a gland at 

 the base beneath ; texture herbaceous or subcoriaceous ; under surface naked or 

 slightly villose and glandular ; veinlets 8-12 on a side ; sori submarginal.— 

 Hk. Sp' 4. p. 94. A. tenerrimura, Fie. 



Hab. West Indies and Guatemala. — A much larger plant than N. conUrmimum, with a 

 basal gland, and nearly twice as many veinlets. 



63. N. (Last.) prolixum. Baker ; st. 1-2 ft. 1., firm, glossy, substramineous, 

 naked or nearly so ; fr. 2-4 ft. 1., 8-12 in. br. ; pinnce 4-8 in. 1., j-1 in. br., cut 

 down nearly to the rachis into entire or bluntish, often falcate lobes 1-1| lin. 

 br., with a prominent gland at the base beneath, the lower ones gradually 

 reduced ; texture subcoriaceous ; rachis and under side more or less villose ; 

 veinlets prominent, 10-15 on a side ; sori submarginal. — Aspid. Willd. N. 

 ochthodes, Hk. Sv. 4. v. 109. N. appendiculatum, Hk. I. c.—jl, iV, tylodes {Ksc. 



