C. dimorphaeanthus. | BECCARI. THE SPECIES OF CALAMUS.- SUPPLEMENT. 117 
cm. long, entirely covered with unequally long, very rigid, needle-like spieulae. Leaves 
with the petiole armed with the same kind of unequal spines as in C. dimorphacanthus, 
at times 7-8 em long; the pinniferous part apparently about 1 m. in length, termi- 
nating in a very robust cirrus, armed with very strong claws in half-whorls. Leaflets 
numerous, equidistant, ensiform, or very narrowly lanceolate, 20-25 cm. long, 13-15 
mm. broad, quite smooth underneath, sprinkled above on the mid-costa and on one 
nerve on each side of it with not very rigid bristles; margins rather closely and 
appressedly spinulous. rutting spadiz about 30 em. long, with smooth spathes and 
very few, small, slightly branched partial inflorescences, of which the lowest are 
only 5 cm, in length and have very few spikelets. Fruit ovoid or subobovoid, 
obtusely beaked, 17 mm. long, including the perianth, 12 mm. broad ; scales in 12 
longitudinal series, polished, of a dirty straw colour, with a narrow paler scarious 
margin, the point blunt and with a blackish spot, deeply furrowed along the centre 
quite to the point, and almost bigibbose. Seed ovoid, 10°%5 mm. long 7 mm. wide, 
broadly pitted, irregularly and rather deeply furrowed on the raphal side, and 
without a chalazal fovea. 
Hasrrat.—On Mount Alcon in Mindoro. Collected by M. L. Merritt at about 
1,500 m, elevation in June 1906 (No. 4399 in Herb. Forestry Bureau, Manila). 
OssERVATIONS,—I have seen of this plant only a very incomplete specimen of 
the leaf-sheaths and leaves, an entire spadix, and a few fruits; the latter were 
detached from the spadix, though to all appearance they really belonged to it. In 
the vegetative organs C. aleonensis does not apparently differ from some forms of 
C. dimorphacanthus, but the fruit is of a different type and more resembles that of 
C. microcarpus. 
SuPPL. PraATE 65,—Calamus alconensis Bece. Portion of a leaf-sheath with 
the lower part of a leaf bearing the leaflets of one side only ; upper end of a 
leaf; fruiting spadix nearly entire; one seed. From the type specimen No. 4399 in 
the Herbarium at Manila. 
187. CALAMUS DIMORPHACANTHUS Bece. Add:—Bece. in Philipp. Journ. Science, 
iv, (1909), 631. 
Add to the localities :—Mount Santo Tomas, Province of Benguet, Luzon (Elmer 
No. 6238, Herb. Manila). 
This is another polymorphic species, allied to C. siphonospathus and 4. microcarpus, 
distinguishable from both, in addition to the already adduced characters (p. 480 of this 
volume) by the fruiting perianth, which in C. dimorphacanthus although pedicelliform, 
is more or less companulate, while in the two other allied species the pedicel is 
cylindrical, and formed by the hardened calyx only. In the typical form, as in 
the specimen mentioned above (Elmer No. 6238), and in var. zambalensis, the 
leaflets are bristly on tbe upper surface on the mid-costa only, while in var. 
montalbanicus the bristles are on 3 nerves, as in C. siphonospathus and C. microcarpus. 
CALAMUS DIMORPHACANTHUS vat.  MONTALBANICUS Becc. in Philipp. Journ. 
Science, iv, (1909), 631. 
