- 43 - 



distinctly, but only indicate the average tijpe of a certain group of plants, which gradates 

 into an other tijpe. Such types might be: 



I. type 1NTEGRIFOLIA ; Verb., PI, II, H, I, Q (P. INTEGRIFOLIA, corymbosa, ob- 

 tusifolia, Ovalifolia)- Leaves ovate, small, entire, base rounded or slightly cordate, 

 apex rounded or indistinctly acuminate. 



II. type abbreviata ; Verb, Pl. II, M (P. abbreviata, serratifolia L.)- Leaves 

 as in I but margins crenate towards the apex. As I this type often occurs near the 

 sea-shore as a small shrub, 



III. type cyclophylla; Verb., Pl. II, K, and, as transition-forms to types IV en 

 V also D and 0 (P. cyclophylla)- Leaves rotundate, base somewhat cordate, apex 

 with a small rounded, sudden acumen. 



IV. type SAMBUCINA; Verb., Pl. II, A, C, E, 0 (P. SAMBUCINA, ? TAITENSIS, sub- 

 glabra)- Leaves ovate-rotundate, entire or slightly crenate towards the apex, base 

 rounded or somewhat cordate, apex shortly acuminate. 



V. type foetida; Verb., Pl. Il, B, F, G, H, L, N, P, Q, R, S (P. foetida, Gaudi- 

 CHAUDii, laevigata, nitida, SUBCORDATA)- Leaves ovate or ovate-rotundate, entire, 

 or somewhat crenate, base rounded or cuneate, apex rather long acuminate. 



There seems to be, generally speaking, a rether parallel alteration of several fea- 

 tures, going from I to V '): 



a. the general habit becomes larger, from a small shrub, V2 M,, to a treelike shrub 



7 m: 



b. the habitat removes from the sea-shore to the inland. 



c. the leaves become larger and more acuminate. 



d. the calyces become more distinctly and acutely toothed. 



Type IV forms a transition from the small- and round- leafed forms. 

 (Type I -III) to those with larger, more acuminate leaves (Type 



V). 



43. Premna macrophylla H. J. L., Verb. 148, (1919). 

 Distribution: Sumatra ! Java ! Borneo ! 



44. Premna depaupeiata MERR. Phil, Journ. Sei, Bot. I, Suppl. 231 

 (1906); Verb. 149. 



In Herb. Bog. also from : 



? Celebes: RIEDEL, Gorontalo. 



Distribution: Pilippines!, ? Celebes ! Tukan-Besi- and Kabaena-isl! 



45. Premna leucostoma MlQ Fl. Ind. Bat. II, 899 (1856); Verb. 149- 

 Leaves 1 2 -8'/ 2 by 1.25-6 c.M. ; petioles 0.3-1.4 c.M, ; base sometimes 

 decurrent; leaves in sicco brownish yellow, not black (point of difference 

 from P. latifoliii). 



In Herb. Bog. also from : 



Java: BACKER n. 13043, Kraksaän ! firs, white, 

 Native name: Waung (j.). 

 Distribution: Java ! 



In Herb. Kds. occurs a from, which has leaves 14'/ 2 by 7'/2 c.M, petioles 3.2 c.M., 

 the corymbs reaching 14 by 8 c.M., peduncles 4 c.M.; we hesitate, whether this form 

 belongs to this species or to the following one, but since its leaves are blackish in 



') Thus it may be possible that the polymorphy in due as well to physiological 

 influences (habitat- modifications), as to variability and hereditary factors. 



