- C. B. Clarke 983
- Charles Baron Clarke 961
- Clarke C.B. 355
- Clarke, C.B. 208
- C.B.Clarke 122
- Clarke, Charles Baron 61
- Clarke,C.B. 24
- Clarke, C. B. (Coll. Barbey-Boissier) 8
- Herb. Boott 7
- Clarke, C. B. (Coll. G) 7
- Clarke CB 4
- Clarke,C.B. & Atkinson,W.S. 3
- Ch Clarke 2
- -- Zollinger 2
- Clarke, C. B. 2
- Paul (Pablo) Günther Lorentz 1
- John Clayton 1
- E. Hall & J. Harbour 1
- N. Wallich 1
- ex herb. Jos. Woods 1
- ex Herb. John Donnell Smith 1
- Sir Everard Home 1
- A. Croall 1
- F. Boott 1
- Dickie 1