ZINGIBERACEAE 159 



Spikes la,tge, cylindric or ovoid, 5 to 20 cm long, the bracts orbicular, 



_ TiMii^dtid or truncate.... „ „ 1. Z. zerumbet 



Spika^taaall, 5 cm long or less, the bracts ovate, cuspidate; cultivated only. 



2. Z. officinale 



1. Zi( aERUMBET (L.) jSmith. Tnmhong-aso (Tag.). 



A glabrous, erect, herbaceous plant from tuberous rootstocks. Leafy 

 stem 0.6 to 2 m high, the leaves numerous, distichous, lanceolate to oblong- 

 lanceolate, 15 to 30 cm long, sessile or shortly petioled. Flower bearing 

 scape produced from the rootstocks, 10 to 30 cm long, bracteate, bearing 

 at its apex the ovoid to oblong or cylindric, green or red, cone-like inflo- 

 rescence 5 to 20 cm long. Bracts numerous, orbicular, imbricate, greenish, 

 turning red,, holding water, 2 to 3 cm long. Flower 5 cm long, whitish or 

 cream-colored, the tube as long as the bracts, the lip 3-lobed. (Fl. Filip. 

 pi. S70, Z, caasummnar.) 



In thickets, common, fl. July to Oct.; throughout the Philippines, cer- 

 tainly introduced. Tropics of the Old World, wild and cultivated. 



* 2. Z. OFFICINALE Eosc. Luya (Tag.) ; Gengibre (Sp.) ; Ginger. ^ 



An erect glabrous plant from thickened, fleshy, very aromatic rootstocks. 

 Stems 0.4 to 1 m high, leafy. Leaves distchous, lanceolate to linear-lanceo- 

 late, acuminate, 15 to 25 cm long, 2 cm wide or less, base narrowed. Scape 

 erect, from the rootstocks, 15 to 25 cm high, covered with distant, imbricate 

 bracts, the spike ovoid to ellipsoid, dense, about 5 cm long. Bracts ovate, 

 cuspidate, about 2.5 cm long, pale-green. Calyx 1 cm long or somewhat 

 less. Corolla g:reenish-yelIow, its tube less than 2 cm long, the lip oblong- 

 obovate, slightly marked with purplish. (Fl. Filip. pi. ISl.) 



Commonly cultivated, fl. Oct.-Dec.; widely distributed in the Philippines 

 in cultivation. Probably a native of India, now cultivated in all tropical 

 countries. 



6. KOLOWRATIA Presl 



Coarse tall plants from underground rootstocks. Stems stout, simple, 

 leafy. Leaves oblong-ovate to lanceolate, large, spreading or reflexed, 

 petioled, the ligule prominent, entire. Inflorescence terminal, branched, 

 stiff, the branches short, rigid, scattered, clothed with large, oblong, per- 

 sistent, rather stiff, densely ^irranged bracts , but one flower opening at a 

 time. Calyx, spathe-like, split down one side, 3-toothed at the apex. Co- 

 rolla-tube short, slightly curved, the lobes broad, the upper one erect, 

 concave, wider than the other two, spreading or reflexed ones. Stanrinodes 

 short, oblong or ovate, attached to the sides of the lip above the base. Lip 

 obovate, slightly 3-lobed or subtruncate. Filament broad, fle^y, adnate 

 to the corolla-tube; anther elongated, grooved on the inner face, the connec- 

 tive prolonged as a flat, ovate appendage. Ovary 3-celled; ovules many; 

 style very slender, stigma obconic. Capsule elRpsoid, somewhat woody, 

 ultimately splitting into 3 valves; seeds very numerous. (In honor of Count 

 F. Kolowrat-Liebsteinsky of Hungary.) 



Species 2, both confined to the Philippines. 



1. K. elegans Presl (Alpinia elegans K. Sch.). Tagbac, Talbac (Tag.). 



A* stout herbaceous plant 2 to 4 m high, nearly glabrous, the root- 

 stocks stout, stems swollen at the base, leafy throughout. Leaves coriace- 



