81 
Clematopsis occupies the old African plateau and Madgascar, 
and a peculiar development of Anemone, the genus Knowltonia, 
is endemic to the Cape. The dioecious Hamadryas, the genus 
Barneoudia, another clear offset of Anemone, Capethia, and the 
recently described and evidently primitive genus Laccopetalum 
are . confined to the Southern Andes and the extreme 
southern parts of S. America. The genus Caltha is readily split 
into two groups, both structurally and geographically, § Populago, 
with 15 species in the Northern Hemisphere, and § Psychrophila 
(see map) with 7 species in the Andes of S. America, 2 species in 
New Zealand, 1 in Tasmania and 1 in South East Australia. Of 
especial interest is the distribution of the genus Coptis (see map), 
from Eastern China and Japan across the colder parts of North 
America to the shores of Greenland, and the genus Paeonia (see 
map), which extends from Western Europe eastwards into 
California, but is entirely absent from Atlantic N. America. 
KEY TO THE TRIBES OF RANUNCULACEAE. 
Ovaries with more than 1 ovule; fruits 
follicular or baccate = - SusBraMiLy I. HELLEBOROIDEAE, 
Flowers actinomorphic : 
Petals large and showy; carpels sur- 
rounded at the base by a fleshy 
is a . - - - - I, Pakonrgeas. 
Petals small and narrow or imperfect or 
absent; no disk - - - - II. HetiEesoreae, 
Flowers zygomorphic ; seeds often trans- 
versely ridged with scales or winged II]. DELPHINEAE. 
Ovaries with 1 ovule; fruit a bunch of dry 
achenes, very rarely baccate 
; SuBFAMILY II. RANUNCULOIDEAE. 
Leaves alternate ; sepals imbricate 
Flowers not subtended by an involucre 
of leaves; calyx mostly caducous ; 
petals mostly present - - - IV. RaANUNCULEAE. 
Flowers subtended by an involucre of 
sistent at flowering time; petals 
- - V, ANEMONEAE. 
absent - . ss 
Leaves opposite; sepals induplicate- 
valvate or rarely partly imbricate ; 
petals absent or represented by 
outer staminodes — - - - - 
Key to the Genera. 
Tribe I. Pasonreaz. Monotypic -— - 
‘Tribe Il. HELLEBOREAE. 
*Flowers solitary, rarely few and subpan-. 
iculate, never racemose. 
@ 19508 
VI. CLEMATIDEAE, 
1. Paeonia. 
