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Even in a living state the young spikes of Z. inflexiitn may be contu- 

 sed with Z. neglect urn ; but they are easily to be distinguisiied seeing that 

 the open pouches of the bracts have an oval mouth in Z. inflexiim and a 

 semicircular mouth in Z. neglectiim as in Z. mocradenia. in old spikes the 

 bracts of Z. inflexum have patent deflexed tips, in Z. neglectiim these are 

 erect; moreover the old spikes of Z. neglectiim are cylindric and sometimes 

 reach a length of 160 mm.XSO, while those of Z. m//cx////2 are rarely much 

 longer than wide. This character is also available for dried materials. The leaves 

 are in both species narrow oblanceolate or oblong lanceolate, tapering to the 

 base into a very short channeled petiole, only a little narrower in Z. /zf^/ec/wm 

 (P 6X7.5, while in Z. inflexum P 5 X 7). For determination this character is 

 of no use. The main shape of the bracts taken apart is the surest means of 

 distinguishing the species in doubtful cases, in Z. neglectum these are truncate 

 or faintly rotundate, in Z. inflexum they are rotundate and somewhat 

 obliquely acuminate. 



Good outgrown spikes of Z. neglectum may also be confused with 

 small ones of Z. macradenia, but here the shape of the spikes, cylindric 

 in Z. neglectum, globose in Z. macradenia and the twice as tall flowers 

 of the latter furnish an easy distinction. 



Z. neglectum is much more common in Java than Z. inflexum. It is 

 collected: Buitenzorg, feet of Mt Salak unto 600 M. (type-specimen). 



Banter djawa (Bandjar) Backer n. 65. 



Pelaboean ratoe, 5 M, Koorders 34352 B. 



South. Pekalongan, Batang-lawa, Backer Jan. 1918. 



Nusa kembangan, Koorders 21992 B. 



Gedongan Pare (Kediri) 150 M, Koorders 42863 B. 



Qunung Wilis (Kediri) ravine of the Kali Purno, Backer 11616. 



Kebon dalem (Tjandiroto) 600 M, Lörzing 770. 



Vernacular name, near Buitenzorg "Tongtak'\ in Pelabuan 

 "Belacatoa" Kds. 



17. Z. macradenium K. Sch. (1904) 174; Val. 1905 t 173? — Z. 

 spectabile Griffith Notul. 3 (1853) 413; Ridley 1899, 128; 1907, 26. 



According to Ridley this species is not specifically different from 

 Z. spectabile and ought to be taken as a synonym. Certainly they are 

 nearly related, there are however some notable differences in the descrip- 

 tions. In Z. macradenia the largest spikes do not surpass 200 mm, the 

 bracts are oblong-obovate, the bracteoles and corolla tube 55 mm. long; 



. calyx much shorter only 25 — 30 mm. long (with the ovary). The lip is 

 black purple or violaceous with yellow spots. Leaves 400X50. 



In Z. spectabile ihe spike is a foot long (— 330 mm.), the bracts are 

 ovate, the calyx is as long as the corolla tube, 1.5 inch = 40 mm, the 



