100 
1891 O. Kuntze followed Boissier in recognising three species as 
Tournesolia obliqua, tinctoria and verbascifolia, the last as 
doubtfully a distinct species. 
In 1912 Pax and Hoffmann reverted to the number of forms 
recognised by Sprengel, Baillon and Miiller, the five enumerated 
by them being (1) Chrozophora tinctoria, A. Juss. (Croton tinc- 
torium, Linn.) ; (2) C. subplicata Pax et K. Hoffm. (C. tinctoria 6. 
subplicata, Mill.-arg.), which they follow Boissier in regarding 
as a hybrid; (3) C. verbascifolia, A. Juss. (Croton verbascifolium, 
Willd.) which they consider, as Jussieu did, to be identical 
with Croton obliquum, Vahl; C. glabrata, Pax et K. Hoffm., 
based on C. tinctoria, var. glabrata, Heldr. (1899); and C. 
oblongifolia, A. Juss. (Croton oblongifolium, Del). This treat- 
ment, like that of Miiller, has the advantage that all the forms 
recognised are valid though, perhaps, not all of them are distinet 
species. It has, however, the disadvantage, as compared with the 
arrangement of Miiller, of following Boissier in merging C. 
hierosolymitana in C. verbascifolia. It is true that C. hierosoly- 
mitana has flowers like those of C. verbascifolia. But it is not 
the case that it is difficult to distinguish between these two forms; 
the difficulty is rather to distinguish, without careful dissection, 
between C. hierosolymitana and C. tinctoria. When we add 
C. hierosolymitana, Spr. to the forms recognised by Pax and 
Hoffmann we find therefore that in the group 7inctoriae we have 
six forms, belonging to four species, as indicated in the subjoined 
conspectus. .- 
CILAVIS SPECIERUM INTER “ T'INCTORIAS.” 
Capsulae maturae distincte muricatae :— 
Folia quam lata duplo longiora; 
capsulae maturae violaceo-pur- 
pureae ; frutex erectus ... ... 6. CO. oblongifolia. 
Folia quam lata minopere longiora ; 
capsulae maturae  rubro-pur- 
pureae; herbae :— 
Antherae 9-11, saepissime 10; folia 
adulta saepius scabrida, raro 
molliter tomentosa :— 
Caulis erectus... wile ... 7. C. tinctoria. 
Caulis prostratus... a Say 2! » var. subplicata. 
Antherae 5-6, raro 7-8; folia 
adulta velutina rarius parce 
. tomentosa... _ ... 8. OC. hierosolymitana. 
Capsulae maturae vix vel minopere muri- 
catae, rubro-purpureae; antherae 
4-5, raro 6-7; folia quam lata 
dimidio longiora :— 
Folia utrinque laxe molliterlanuginosa 9. C. obliqua. 
Folia utrinque glabrescens vel glabra.. 9b. var. glabra. 
6. Chrozophora oblongifolia, A. Juss. ex Spr. Syst. Veg. iii. 
is 850 (1826). Hornotina herbacea, diutina fruticosa, erecta ; 
lia. subffoccoso-tomentosa quam lata duplo longiora, margine 
