166 
this shaded hollow the Bracken grows more luxuriantly than at 
“A.” The fronds grow larger, and are broader and more 
vigorous. In the more exposed situation at “A” the Bracken 
grows vigorously, but, as already stated, the fronds come later 
and go earlier, and they are somewhat smaller and distinctly 
narrower and harder than at “‘ B.” This difference in situation 
is the only real difference which has been found which I can 
suggest as the cause of the difference in composition found in 
the plants taken from the two places, and it hardly appears to 
be a satisfactory explanation for so remarkable a difference in 
Nitrogen content. 
XVII. DATURICARPA, A NEW GENUS OF 
APOCYNACEAE. 
O. Srapr. 
A few months ago Dr. E. De Wildeman submitted to me for 
examination some material of Apocynaceous plants which had - 
accumulated in the Herbarium at Brussels during recent years, 
being found unreducible to any described genus of the family. 
The structure of the fruit showed undoubtedly novel characters. 
The habitus and general aspect of the flowers pointed to Taber- 
nanthe and Pterotaberna, but the structure of the anthers differed 
essentially from that obtaining in either genus and was practi- 
cally the same as in Carvalhoa, from which it differs, however, 
in the corolla and to some extent in the habitus. There are 
three and possibly four species discernible, all closely allied and 
forming together a well defined and homogeneous group which 
may be proposed as a new and distinct genus, Daturicarpa, a 
name which speaks for itself. 
Daturicarpa, Stapf, gen. nov. (Apocynaceae—Tabernaemon- 
taneae); affinis Carvalhoae, K. Schum., sed corolla plane hypo- 
craterimorpha, antherarum connectivo basi antice calloso piloso, 
praecipue vero mericarpiis bacciformibus undique verrucis vel 
spinis mollibus obtectis distihcta. 
Calyx parvula, herbacea, intus eglandulosa (vel interdum 
patielgietaiae t); sepala 5, sublibera, imbricata, ovata, eciliata. 
orolla hypocraterimorpha ; tubus basi leviter ampliatus, e 
isthe sursum sensim angustatus, ore exappendiculatus, intus 
pone antheras lineis pilosis singulis notatus; lobi latiusculi, 
obtusi, sinistrorsum contorti, in alabastro haud ‘inflexi. Stamina 
medio tubo inserta; antherae in conum conniventes, in tubo 
inclusae, stigmati haud vel vix agglutinatae, lineari-sagittatae, 
acuminatae, caudis longiusculis incurvis acutis, dorso glabrae, 
connectivo ima basi postice ac antice calloso et hic laxe piloso, 
thecarum parte pollinifera parti sterili laevi fere aequali. Discus 
indistinctus, ovario adnatus, carnosulus. Carpella 2, basi excepta 
libera, sensum in stylum filiformem abeuntia ; stigma capitatum, 
breviter apiculatum, basi anguste manicatum, leviter 5-suleatum, 
