May 31, 1919] Zingiberaceae of the Sorsogon Peninsula. 2991 



related to Alpinia pendula Ridl. So far not known outside of 

 Luzon. The second species of the genus I now consid- 

 er Alpinia diversifolia (Elm.) Elm. n, comb. (Vanoverbergia 

 divernjolium Elm. Leaf. Philip. Bot. viu, 2913, 1915.) 



ZINGIBER Aden. 



Zingiber officinale Rose. 



Represented by number 17417, Elmer, Irosin (Mt. Bulu- 

 san), Province of Sorsogon, Luzon, September, 1916. 



This species has been repeatedly observed in cul- 

 tivation but only once was it seen with floral heads. 

 Its rhizome is extensively use«i by the natives who call 

 it "Lnya". 



Zingiber sylvatica Elm. 



Field-note for 14992:— In wet earth upon a large 

 bowlder of densely wooded stream banks at 1500 feet 

 altitude. Stem severally clustered, ascending from the 

 base, strongly recurved so that the apical portion 

 usually rests upon other herbs or upon the ground and 

 forming nodules of individual plantlets, terete, as thick 

 as a lead pencil, dull green except the slightly reddish 

 brown bracts, 3 to 5 feet long, the basal one fourth 

 leafless; the coriaceous leaflets horizontal or descending, 

 flat except the recurved tips, much lighter green beneath, 

 gradually reduced toward the very slender distal end 

 of the stem; inflorescence few to several, erect, arising 

 from the rhizomes, upon 6 inches long pale green terete 

 though bracteate peduncles; heads pale green, generally 

 terete, 1 inch thick throughout, 3 to 5 inches long, only 

 the bract margins and tips brownish tinged, the apical 

 portion of the imbricating bracts curved upon the ven- 

 tral side; flower odorless, pale yellow throughout except 

 the watery white basal portion; floral bract 3.5 cm. long, 

 oblong, 8 mm. wide across the middle or below it, subacute 

 at the apex, rather broad at the base, glabrous, hya- 

 line, striate, purplish spotted along the margin toward 

 the apex; calyx 1.5 cm. long, white below, greenish above 

 the middle, hyaline, spathaceous, few parallel veined and 

 purple spotted, apex truncate or obscurely bidendate; 

 corolla 4.5 cm. long including the lobes, the basal one 

 half slenderly tubular though gradually becoming thick- 

 ened toward the lobes, glabrous, flaccid, hyaline, simi- 

 larly veined and spotted; the lobes lanceolate, few veined 

 and spotted, otherwise hyaline, gradually tapering to the 



