Volume II 
JULY, 1917 
No. 3 
THE SECTION TUBEROSAE OF THE GENUS 
CRASSULA Linn. (WITH DESCRIPTIONS OF 
TWO NEW SPECIES) 
By S. SCHONLAND. 
Under the section Tuberosae I unite the sections Crenato-lobatae and 
Tuberosae as defined by Harvey in the Flora Capensis, vol. n, p. 335. It 
includes, therefore, the genus Septas Linn, in PJ. Afr. Rar. 10 (1760) and 
Amoen. Acad, vi, 87 (1764), retained by Haworth in Syn. PI. Succ. p. 61 
(1812), by De Candolle in Monographic des Crassulacees, p. 26 (1828) and 
“Prodromus,” m, p. 383 (1828), and by Ecklon and Zeyher in “Enumeratio, 
p. 292 (1837). 
It was, however, already merged into the genus Crassula in Phunberg s 
“Flora Capensis,' 5 ed. Schultes (1823). The section also includes the genus 
Petrogeton E. & Z. in “Enumeratio,” p. 291 (1837). 
It may be defined as follows : 
Herbae perennes carnosulae rhizomate tuberoso vel rarius elongato 
carnoso, foliis oppositis paucis petiolatis vel sessilibus vel perfoliatis disci- 
formibus laminis subplanis suborbiculatis vel ovatis cordatis vel reniformibus, 
margine plerumque crenatis, rarius usque ad basin fere dissectis, inflore- 
scentiis saepius terminalibus subumbellatis vel thyrsoideis, petalis sine 
mucrone subapiculato, filamentis subulatis, antheris saepius late oblongis, 
ovariis oblique ovatis, stilis filiformibus, squamis minutis obcuneatis. 
The section is most largely represented in S.W. Cape Colony, extending 
into Namaqualand and the Karroo. One species, Cr. Saxifi ago Haiv., 
extends eastwards to the neighbourhood of Port, Elizabeth and Somerset 
East, and is said also to occur in the Albany district. Cr. nemorosa Endl. is 
essentially an inhabitant of the Eastern districts of Cape Colony, vhile one 
species, Cr. umbraticola N. E. Br., is restricted to the Drakensberg lan^e. 
All species favour damp, shady localities, such as damp rocks. n t 
whole the section is a fairly natural one, but relations to othei sections 
be traced in the following species: Cr. Aitoni Britt, and Bale. f. m Uj™ 
of Bot. xxxv (1897), 480 ; Cr. parvipetala Schonl. in Rec. Alb. Mus. n ( 
8 
A. B. H. II. 
