171 
RUBIACEAE, 
Mussaenda cylindrocarpa Bek. 
Habitat the East Indies. 
Coll. Sept. 1896, July 1897. 
As is well known the calyx-limb consists of five narrow lobes, 
of which, however, one may broaden to a large petal-like organ, 
which phenomenon is shown by a few flowers of the same 
inflorescence. Our illustrations (figg. 90, 91) show that the 
changed development may affect also the other sepals, even 
all of them at the same time. This fact is in contradiction 
with Morren’s opinion according to which the petaloid sepal 
should be the outcome of a fusion of the said sepal with a 
bract (Penzic II p. 36). Mr. Smita has also collected cases of 
hexamery. 
Cinchona succirubra Pav. 
Habitat Peruvia. 
Coll. May 1898 by William Kessler, Tjampaca Warna, Garoet. 
Leaf bifid in connection with the fissure of the midrib. 
Posoqueria multiflora Lem. 
Habitat Brazil. 
Coll. May 1897. 
Two of the petals more than halfway cohering. 
Pentas carnea Bth. 
Habitat West-Africa. 
Coll. January 1893, June 1895. 
L Stem dichotomous; dichotomy introduced by flattening and 
grooves on the broad sides (fig. 92). 
IL. (The normal flower has five unequal sepals, and a five- 
lobed corolla). 
a) Flowers tetramerous. 
b) Flower according to the formula: K (5) P(4) M 4 C(). 
2 eee : oo » KO) P@)M4C@); 
the extra-petals are placed on the inner side of two 
others, consequently serial doubling. 
