ACROSTICHUM, § HETERONEUROxN. 265 



try, alt. 3000 feet, growing in the rocky river-bed, Dr. Kirk, Livingstone s Erp. 

 — Our s|)eciniL'iis from Barter and Kiri< are specifieally identical witli those we 

 liave received from IleudcJot; hut they are smaller and blacker, apparently more 

 succulent, proi)al)ly having been more submerged, for the plant is quite an aquatic. 

 I may mention a third (but sterile) form of this from Barter, gathered "on sunk 

 rocks under water in ravines near Free Town, S. Leone:" the caudex is long and 

 almost illiform, the stipites and rachis not thicker than sewing-thread, the pinnai 

 narrow and pinnatifid, the areoles few and large, with very few free veinlets. 



135. A. (Heteroneuron) Presliamtm, Hook. ; " caudex 

 stout creeping ])aleaceous with narrow attenuated lanceolate 

 scales, fronds pinnated glabrous, pinnae remote subopposite 

 shortly petiolate, rachis winged ; sterile ones acute attenuate 

 at each extremity rarely obtuse beneath dotted with numerous 

 very minute points, superior pinnae often trilobed, inferior 

 ones often two-lobed, superior lobe short very obtuse ; /er- 

 tile fronds longer stipitate, j)inn8e all very obtuse acute at 

 the apex, terminal onejonger." — Heteroneuron, i^'r, Acrost. 

 p. 92. /. 39. /. 1. Poecilopteris, Moore. Acrostichum punc- 

 tulatum, Pr. {not Sw.). Campium, Pr. 



Hah. Philippine Islands (Presl). Asia, Hugel (Fee). Concan, Laiv. — My 

 specimens from Mr. Law are all sterile, but they correspond so well with Fee's 

 figure and description that I cannot doubt their identity. The stipites are ap- 

 proximate and tufted, 6 inches long; the fronds about the same length, dark, 

 opaque-green, sul)Coriaceo-membranaceous ; pinuje 2^-3 inclies long, 4-5 lines 

 wide, narrow-lanceolate, bluntly acuminated, entire, tapering below into a rather 

 long, winged petiole, and decurrent on the rachis, which is aiso thus winged, upper- 

 most ones more or less confluent at the apex, so that th^- i^xtremity is pinnatifid ; 

 venation obscure; costules evident, these are connecti.; by rarely more than 

 two pairs of opposite veinlets, which meet at an acute angle and are prolonged 

 into a single free veinlet, included in the areoles. The aspect and affinity of the 

 plant are certainly with A. Jleudelotii. 



136. A. (Heteroneuron) salicinum, Hook.; caudex creep- 

 ing, stipites 4 inches to a span long strami leous (as are the 

 raciiis and costcc), fronds iirm-membranaceous dark-green 

 3-4 inches to a foot long ovate-oblong pinnated to the very 

 apex, pinnffi of the sterile frond 2-3-10, 1^-4 inches long 

 rarely exceeding h an inch broad lanceolate sometimes long 

 and finely acuminate or obtuse entire or subserrate cuneato- 

 attenuate long-petiolate, terminal pinna similar to the rest 

 longer petiolate, costules obscure with few transverse con- 

 necting arched veins, these form about two series of large 

 areoles next the costa irregularly anastomosing towards the 

 margin, free included veins rare ;y!:'v7//e fronds rather smaller 

 more obtuse and in one instance rather coarsely serrated. 



Hah. Niger Exped., Sierra Leone, Barter. Fernando Po, O. Mann, ». 1339. 

 — This very distinct pinnated species has the appearance of having grown in wet 

 VOL. V. 2 .M 



