THE SECTION TUBEROSAE OF 
450, and Cr. Marlothii Schonl. in Journ. Linn. Soc. (Bot.), xxxi (1897), 
p. 553 (which may be identical with Cr. •minima Thunb. in FI. Cap. ed. 
Schultes, p. 292). 
The so-called “tuberous roots'’ of descriptive works found in this section 
are, as far as I have investigated them, stem-structures. They are not only 
found in Harvey’s section Tuberosae but also in his section Crenato-lobatae 
where, e.g. in Cr. nemorosa End!., they are a means of extensive vegetative 
reproduction. In Cr. dentata Thunb. even the aerial stems form at their 
nodes tubers, which, no doubt, serve the same purpose. Similar tubers are 
found in the floral region of Cr. nemorosa Endl. In most species the con- 
nective is broadened. This does not occur in any other section of the genus 
except in Cr. parvi/petala Schonl. which belongs to the section Tillaea. 
Some of the species are extremely variable especially in the size of their 
vegetative organs. 
Key to the species : 
I. Leaves deeply divided. 13. Cr. alcicornis Schonl. 
II. Leaves entire or nearly entire. 
A. Leaves distinctly petiolated. 
a. Cymes lateral and terminal. 
a. Petiole broadened (not filiform), lamina entire or 
faintly repand. 
1. Calyx lobes ovate, sub-acute, 2/3 of corolla in 
length . 
3. Cr. nemorosa Endl. 
2. Calyx lobes ovate, obtuse, 1/3 of corolla in 
length. 
4. Cr. confiisa Schonl. et Bak. f. 
/3. Petiole filiform, lamina more or less repando-crenate 
or lobulate. 
1. Cr. dentata Thunb. 
b. Cymes terminal. 
a. Sepals and petals obtuse-. 
2. Cr. Dielsii Schonl. 
j 6. Sepals and petals acute. 
1. Sepals about half the length of the petals. 
Styles about the length of the ovaries. 
Margin of leaves crenate. 
5. Cr. Promontorii Schonl. et Bak. f. 
