ROXBURGH'S SPECIES. 39 
I believe that I have recognized C, dioicus and also C. rudenlum in some 
specimens collected in Cochin-China by Mr. L, Pierre. I cannot say the same of 
C. petraeus. lf the description of this species be correct, this cannot be a Calamus, 
asthe spadix is said to be terminal and we ought to suspect it to be a Plectocoma 
or a Korthalsia rather than a Calamus ; the citation, however, of Rumph's Palmijuncus 
Calapperius (Herb. Amboin., v, t. 41), adduced by  Loureiro, is against this 
opinion because Rumph’s plate represents an easily recognizable Daemonorops, C. 
petraeus therefore still remains an enigma. 
Another enigma is C, verus. By its short spadix and oblong spathe, and also 
by the plate cited from Rumph (Palmijuncus verus Herb. Amboin, v. t. 94) we 
might believe that we had to deal with a Daemonorops of the section Piptospatha ; 
and by its leaflets, which are described as ovate-lanceolate, it would approach D. 
didymophyllus. Probably then C. verus is a Daemonorops not found again by modern 
botanists. 
C, amarus appears to me to correspond to C. tenuis Roxb. (vide observations 
under that species); but as there is not complete evidence of this identification, and 
as there never can be absolute proof owing to the non-existence of authentic : 
specimens, I haye not proposed the adoption of the name C, amarus instead ‘of 
C. tenuis, although the former be more ancient than the latter. 
XXIV.—Note on Roxburgh’s Species of Calamus. 
In his Flora Indica (ii, p. 778, et seg.) Dr. William Roxburgh gives 
descriptions of the following species of Calamus to which I have added when 
necessary the corresponding correct name :— 
Calamus Zalacca Willd. =Zalacea sp. 
5, humilis Roxb. Perhaps the young M of €, latifolius. 
T erectus Roxb, 
© Draco Wild. =Daemonorops, 
" latifolius Roxb. 
»  Trudentus Willd. (not C. rudentum Lour.) =C, albus is 
5j extensus Roxb. =Daemonorops Jenkinsianus Gr. ? 
3 quinquenervius Roxb. =C. palustris amplissimus Beec, 
T Rotang Willd. 
» faseiulatus Roxb. =C., viminalis fasciculatus Becc. 
» tenuius (tenuis) Roxb. 
,  pencillatus (sic) Roxb. =C. javensis Bl.? 
» gracilis Roxb. 
„  monoicus Roxb. =C. Kotang. 
Of the species proposed as new by Roxburgh, the following species :—-C. erectys 
.Q,. latifolius, C. gracilis and C. tenuis, haye therefore been definitely anette 4 FT 
additions to science. 
Owing to authentic specimens not being now available, the following neenajn 
more or less doubtful:--C. extensus, C, quinguenervius and C.  pencillatus ; reference 
may be made to what has been said regarding each of these under the heading — 
of doubtful species, 
