Network


Latest external collaboration on country level. Dive into details by clicking on the dots.

Hotspot


Dive into the research topics where Richard Crook is active.

Publication


Featured researches published by Richard Crook.


Bradleya | 1996

Opuntia Index Part 2: Nomenclatural note and C-E

Richard Crook; Roy Mottram

Summary: Some notes on the validity of names published by Engelmann and Emory in 1848 are contributed by Roy Mottram. The alphabetic index of Opuntia names is continued from Bradleya 13: 88–118. 1995.


Bradleya | 2001

Opuntia IndexPart 7: Nomenclatural note and P–Q

Richard Crook; Roy Mottram

Summary: n A note on the Saint Louis Code 2000 is contributed by Roy Mottram, and its effect on names in this index is discussed. The alphabetic index of Opuntia names is continued from Bradleya 18: 113–140. 2000. Includes eight new typifications (1 LT, 5 NT, 2 ET), and six new cultivar standards. Two paintings by Duncanson, lodged in the Kew herbarium, are reproduced here for the first time.


Bradleya | 2004

Opuntia Index Part 10: T-V

Richard Crook; Roy Mottram

Summary: n The alphabetic index of Opuntia names is continued from Bradleya 21: 63–86. 2003. There are no new names published here, but there are nine typifications (3 LT, 4 NT, 2 ET) and one new cultivar standard.


Bradleya | 2005

Opuntia Index Part 11: W-Z, cultivars

Richard Crook; Roy Mottram

Summary: n The alphabetic index of Opuntia names is continued from Bradleya 22: 53–76. 2004. There are no new names published here, but there are two typifications (1 NT, 1 ET), and eleven cultivar standards designated.


Bradleya | 2003

Opuntia Index Part 9: S

Richard Crook; Roy Mottram

Summary: n The alphabetic index of Opuntia names is continued from Bradleya 20: 51–66. 2002. There are no new names published here, but there are six typifications (5 LT, 1 NT).


Bradleya | 2002

Opuntia IndexPart 8: R

Richard Crook; Roy Mottram

Summary: n The alphabetic index of Opuntia names is continued from Bradleya 19: 91–116. 2001. There are no new names published here, but there are three typifications (1 LT, 2 NT), and one new cultivar standard.


Bradleya | 1995

Opuntia Index Part 1 : Introduction and A-B

Richard Crook; Roy Mottram

Summary: An alphabetic nomenclator to epithets that have been published in the genus Opuntia at specific and infraspecific levels is presented. Special attention has been given to typification wherever possible, but taxonomic judgements have been avoided. An introduction and brief history of opuntia has been contributed by Roy Mottram.


Bradleya | 1998

Opuntia Index Part 4: G-H

Richard Crook; Roy Mottram


Bradleya | 2000

Opuntia Index Part 6: M-O

Richard Crook; Roy Mottram


Bradleya | 1999

Opuntia Index Part 5: Nomenclatural note and I-L

Richard Crook; Roy Mottram

Collaboration


Dive into the Richard Crook's collaboration.

Researchain Logo
Decentralizing Knowledge