ORR—TRACHEAL TISSUE IN CAPPARIDACEAE. 257 
Capparis spinosa, Linn. Baluchistan (1888), Lace. 
3 cidua, Pax (aphylla, Baluchistan (1887), Lace. 
sone 
»  _fravic Burma, Lace, No. 4879. 
¥ santhphla, "Coll et Burma (1909), Lace. 
Hem 
icra DC. S. Siam, Mrs D. J. Collins, 
No. 7. 
flexuosa, Blume. Cult. Roy. Bot. Gdn., en 
Maerua parvifolia, Pax S. Africa, piece No. 2 
Niebuhria siamensis, Kurz. S. siam, Mrs D. J: Collins, 
No. 4. 
A pophyllum anomalum, F. Muell. Australia. 
Crataeva religiosa, Forst. Sikkim. 
Oe ophospermum, Kurz. Burma, Lace, No. 5354. 
Euadenia eminens, Hook. f. Cult. Roy. Bot. Gdn., Edin. 
Since this paper was written, the author has had an oppor- 
tunity of examining ripe seeds of species belonging to three 
additional genera of the Capparidaceae, viz. Dactylaena mic- 
vantha, Schrad., Gynandropsis pentaphylla, DC., and Steriphoma 
cleomoides, Spreng., the seeds of which were obtained from the 
University Botanic Garden, Copenhagen. 
The tracheal envelopes of the species of Dactylaena and 
Gynandropsis are well defined, and have the characteristic 
structural features possessed by Cleome and Polanisia. Since 
these four genera belong to the Cleomeae section of the family, 
this similarity of:structure serves to confirm the conclusion 
arrived at in the paper, namely, that the configuration of the 
tracheal envelope is a distinctive feature separating the Cleomeae 
from the Cappareae. 
In the seed of Steriphoma cleomoides the sheath is of the 
shallow type, with delicate annular markings on the anticlinal 
walls of the tracheides. It most closely resembles that of 
Maerua, but consists of only one layer of tracheal elements. 
This apparent affinity corresponds with the position assigned 
to the genus in Bentham and Hooker’s Genera Plantarum. 
