~ 142 — 



Bracteolae laiiceulato-obloiigae acuminatae, calyceni longitudine haud 

 superantes (23 iiini, X 6). 



Calyx teuer apice angustato-truncatus, corollae tubo 1/3 parte brevior. 

 Corolla coiicolor pallide sulfiirea 60 mm. longa, tubus 35 mm. longus. La- 

 bellum trilobum late ovatuin 25 mm. circ. longum, lobo mediano ovato-oblongo 

 apice subretuso, lobi (staminodia lateraliter adnata) late ovati apice trun- 

 cati, parte libera circ. 4 mm. longa, erecti, in flore explanato lobo mediano 

 paralleli. Stamen 25 mm. longum, anthera et crista aequalibus. Petala latera- 

 lia labello longiora, dorsale stamen aequans. 



By the sooty pubescence of all parts, by the small elliptic spikes the 

 shorter flowers and bracteoles the broader sidelobes of the lip, the shorter 

 stature and leaves and the very short ligula, this form differs from 

 Z. acuminalum. Still both have in common so many characteristics: habit, 

 shape and colour of bracts and flowers, general shape of labellum etc, 

 bracteoles shorter than calyx, that 1 consider them as varieties. 



Distribution: Borneo centralis leg. Nieuwenhuis. Cult, in Hort. bog. 

 XI B^ 141 (rarely flowering). 



13. Zingiber acuminatum var. acutibracteata. 



Herba bimetralis puberula. Folia subsessilia oblongo-lanceolata subtus 

 imprimis ad costam puberula. 380X60. Ligula brevissima truncafa subre- 

 tusa, lobis (angulis) trigonis ciliatis. 



Spicae modice pedunculatae saepe maximae, cylindricae vel ellipticae 

 obtusissimae, 100 — 200 X 40 — 50 mm, pedunc. 50 — 150 mm. longo crasso, 

 sericeo, squamisoblongo-ellipticis vestito; bracteae dense ovatae in vivoobtusae, 

 sub apice minute nuicronatae haud inflexae, in sicco acutae, parte libera 

 subrhomboidea acuta, sericeo-puberula, membrana crassa tomentosamarginatae. 



Flowers are wanting. 



"Spike not much above the ground. Red upper part of the bract ob- 

 tuse with a mucro below the top, the bracteole is transparent pale pink 

 35 mm. long. Ovary 5 mm. long. Calyx hyaline, membranaceous, pink at the 

 top, 30 — 35 mm. long. Corolla 60 — 70 mm. long, pale sulfureous, petals 

 25 mm. Labellum broadly trigonous, 3-lobed, obtuse or refuse, pale 

 sulfureous. Crest of the anther 14 mm. long". (Backer). 



This form must be considered either as a variety of Z. acuminatum 

 or as a vicariating species. Backer, who collected it, took it for Z. acuminatum. 

 The shape of the spikes however is very different and as far as can be- 

 concluded from the dried material, the bracts apparently are not inflexed 

 and gibbous at the top. Moreover the leaves are narrower, the ligula is 

 much shorter and the pubescence denser. 



This form, as well as the var. borneensis, agrees in many points very 

 well wiih Z puberulum Ridl, there however the pubescense is brown coloured. 



