ADIANTUM. 49 



long linear-lanceolate coarsely serrated, stipes aculeate, cau- 

 dex creeping." Willd. Sp. PL v. p. 442. Polypodiura py- 

 raniidale, Linn. Sp. PL p. 1554. Sw. St/n. FiL p. 72. — 

 Pet. FiL p. 40, t. 4,/. 2 {according to Linmcus). Plum. FiL 

 t. 54 {according to Swartz and Willdenow). 



Hab. America, {Linnaus). Hispaniola, Plumier. Liniifcns only quotes 

 Petivei-'s figure ; Swartz and Willdenow only Phmiier's. — If an Adiantum 

 at all, and a good species, and if Plumier's ligure be any authority for the 

 Linntean plant, it may rank near A. crutatum, L. 



100. A. poli/phgllum,\\ i]\d.; "fronds quadruplicato-pinnate 

 dimidiate obtuse truncated at the base, superior margin inci- 

 so-serrate, serratures denticulated, sori oblong," Willd. Sp. 

 Pl.v. p. 454. H. B. K. Nov. Gen. Am. i. p. 21 ? {tiot Kunze, 

 according to Presl and Klotzsch). 



Hab. S. America, C'araccas, Bredemei/er, {Willd.) — It is in vain, without 

 authentic specimens, or a good description, to attempt to identify this 

 plant. Kunth, under his A. poli/phi/lliim, gives, in the specific character, 

 " pinnules rhomboid-oblong obtuse shortly petiolate upper margin and apex 

 deeply duplicato-crenate, — sori numerous subreniform." — It is no wonder 

 that with such conllicting and inadequate characters other botanists should 

 be led astray. Thus, Kunze's A. poli/p/u/llum, for which he cites both 

 Willdenow and Kunth without doubt, is pronounced by Presl to be differ- 

 ent from that of Willdenow, and called by him A. myriophyllum, and by 

 Klotzsch A. macrocladum. I must acknowledge the Willdenowian plant to 

 be unknown to me. 



101. A. macrocladnm, Kl. ; large quite glabrous, frond 

 bipinnate tripinnate below, pinnaD distant broad-lanceolate 

 attenuated at the base and at the extremity, pinnules dark 

 brownish green opaque submembranaceous crowded slightly 

 imbricated patent obliquely oblong scarcely subfalcate very 

 obtuse cuneate at the base superior base truncated upper 

 margin and apex regularly crenato-serrated, sori copious very 

 small on every lobule on the upper margin, sori small semi- 

 oval, stipes (tall) and rachis everywhere ebeneous and shin- 

 ing. (Tab. LXXXIII. B.). — A. macrocladum, Kl.in Linnaia, 

 xviii. p. 554. A. polyphyllum, Kze. in LinntBa, ix. p. 82, 

 {excl. syn.). Poeppig^ Plant. Exsicc. Peru v. A. myriophyl- 

 lum, Presl, {name in Tent. Pterid.) 



Hab. Peru, Poeppig, (Kunze in Herb, nostr.). — I have only seen the 

 solitary specimen from Kunze, and this is remarkable among the much- 

 branched Adianta for the very compact and closely placed pinnules of an 

 almost exactly oblong (or parallelogram) form, obliquely cuneate at the 

 base, and for the small sori. Klotzsch says " ab Ad. pnli/p/n/lln differt, 

 rachibus pulverulentis (which is certainly not the ease in my sj)ecimen) 

 nee nitidis, pinnulis falcatis (scarcely so in our specimen) crenato-denta- 

 VOL. II. H 



