THE SCIT AMINES OF THE PHILIPPINES. 193 



the plant, var. argyrophyllus, is the only at all distinct one, and there are interme- 

 diate forms between the large typical form and that. The chief variations in the 

 plant lie in the amount of pubescence, the size of the flowers and of the spike, the 

 amount of rose-tinting of the corolla, and the amount of yellow in the lip. 



2. C. Clemensae sp. nov. 



Khizome woody. Stem 1 m or more tall, thick. Leaves oblanceolate, 

 acuminate, narrowed at the base, 12 cm long, 4 cm wide, the upper sur- 

 face glabrous except the midrib, the lower surface covered with appressed, 

 silky hairs; sheath 2 to 4 cm long, ribbed, thickly hairy; ligule ciliate; 

 petiole densely hairy. Inflorescence from the rhizome, the peduncle thick, 

 about 3 cm long, covered with sheathing bracts, hairy. Spike 8 to 10 cm 

 long, 7 cm thick, red. Bracts lanceolate, closely ribbed, silky-hairy, 3 

 cm long, 1 cm wide, with a stout thorn-like mucro 5 mm long. Inner 

 bract similar but narrower, 2.5 cm long, 4 mm wide. Calyx tubular, 

 with three short, ovate, mucronate, pungent lobes, densely hairy, 3 cm 

 long, 1 cm thick. Corolla white, the tube shorter than the calyx, hairy, 

 the lobes linear-oblong, acuminate, acute, densely hairy outside, glabrous 

 within, 2 cm long, nearly 1 cm wide. Lip 3 cm long, the center fleshy- 

 papillose, the margin undulate, crisped, glabrous. Stamen shorter, the 

 anther linear-oblong, the connective linear-oblong, the apex subacute, 1 

 cm long. Stigma very large, flabellate, reniform, the margins ciliate. 



Mindanao, Lake Lanao, Camp Keithley, Mrs. Clemens 1113. 



A very striking plant with the habit of Costus globosus Blume, but distinct in 

 its pubescent white corolla, very long connective-crest, and large reniform stigma. 



MAHANTACEJ& 



16. DONAX Lour. 



Stems tall, shrubby, much branched. Leaves ovate or oblong, the 

 petiole short; ligule none; sheaths long. Panicles erect or pendulous, 

 lax. Bracts narrow-lanceolate. Flowers small, white. Corolla-tube 

 usually long. Staminodes obovate, unequal. Ovary 3-celled, the cells 

 1-ovuled. Style stout, incurved. Fruit usually indehiscent, 1- to 3- 

 seeded, globose or trigonous. Seeds globose or hemispheric. 



Species 5, Indo-Malayan. 



1. Donax cannaeformis Rolfe in Journ. Bot. 45 (1907) 243. 



Thalia cannaeformis Forst, f. PI. Ins. Austr. Prodr. (1790) 1. 



Ilythuria cannaeformis Raf. Fl. Tellur. 4 (1830) 51. 



Actoplanes cannaeformis K. Schum. in Pfianzenreich 11 (1902) 34. 



Donax arundastrum K. Schum. in Pfianzenreich 11 (1902) 33, quoad philip- 

 pinense, non Lour. 



Stems 2 to 3 m tall. Leaves ovate, thin, glabrous, 15 to 18 cm long, 

 9 cm wide; petiole 1 cm long. Panicles 15 cm long or less, few-branched, 

 the nodes hairy. Bracts papery, lanceolate, acute, 3 cm long. Flowers 

 white, 3 cm long. Calyx-tube 1 cm long, the lobes lanceolate, acute, 

 ribbed. Corolla-lobes linear-oblong, longer than the tube. Staminodes 



