C. aquatilis.] BECCARI. THE SPECIES OF CALAMUS.—SUPPLEMENT. T9 
the new species C. Merrittianus, which was distinguished on account of its primary and 
secondary spathes being densely prickly, while those of the typical C. Merrillii of 
Luzon have these spathes quite smooth. 
Later I have also (Philipp. Journ. Se. ii, 233; considered as belonging to C. 
Merrittianus the specimens of a Calamus collected in Mindanao by Mrs. Mary Strong 
Clemens ‘Nos. 1112 and 1124, Herb. Manila’, which had primary and secondary 
spathes also prickly, but in a lesser degree than in the plant from Mindoro, 
presenting therefore a transitional form between C, Merrittianus and C. Merrill, and 
I expressed on that occasion the opinion that perhaps C. Merrittianus was only a 
variety of C. Merrili Now I am strengthened in this opinion by the additional 
material collected in Mindanao by Mr. Elmer (Nos, 11874 and 11885) Number 11874, 
collected at Todaya on Mount Apo, has a sheathed stem 8-9 cm. in diameter, and 
bears an entire male spadix, which has the primary and secondary spathes at times 
densely, and all others slightly prickly. | Number 11885, also from Todaya, , bears & 
spadix with mature fruits, which agree exactly with those of the typical C. Merrillii 
from Luzon, and has some of the secondary spathes smooth, while others are more 
or less prickly. ‘This Calamus is named by the natives in Mindanao ‘ Acab-bacab,” 
In conclusion the typical C. Merrillii is the Luzon plant with smooth secondary spathes. 
The variety Merrittianus with densely prickly secondary spathes is particularly the 
plant. of Mindoro, while the plant of Mindanao is intermediate between the two. 
Supet, Prate 42.—Calamus Merrillii var. Merrittianus Bece. Upper portion of 
a leaf-sheath with the base of the petiole; intermediate portion of a leaf; partial 
inflorescence with growing ovaries. From Merritt’s No. 3912 in Herb. Beccari. 
CALAMUS MERRILLII var. NANGA Becc. n. var. 
Descriprion.—A smaller plant than the type.  Sheathed stem 5 cm. in diameter. 
Leaf-sheaths less densely armed than in the type, but with the same kind of spines- 
cence. One leaf is 4°5 m. long in the pinniferous part, the upper end of the rachis 
gradually passing into a very robust and long cirrus, armed with half to three-quarter 
whorls of extraordinarly robust black claws; the petiolar part is about 50 em. long, 
very robust, 3°5 em. broad, concave above, convex below, prickly on the edges ; leaflets 
exactly as in the type. A fruiting spadix is 1'40 m. long; its primary spathes are 
minutely prickly, the secondary spathes are smooth or nearly so; spikelets more 
slender than in type. Fruit spherical, also smaller than in type, 9 mm. in diameter, 
otherwise the same. 
Hasitat.—Collected by Elmer in the Island of Mindanao at Todaya on Mount 
Apo in wooded gulches, and along the Sibulan River gorge at 300—600 m, 
No. 11110 in Herb. Beceari. Vernacular name “ Nanga.” 
OssERVATIONS.— Except in the smaller size of the plant, in the more slender. 
spikelets and in the smaller fruits, I have discovered no differences in it from the 
typical C. Merrill. 
141. CaLawus aquatilis Ridl. Add: Ridl. Mat Fl. Mal. Penins. ii, 210.— 
Daemonorops erinaceus Bece. in Hec. Bot Surv. Ind. ii, (1902), 225. 
