Species
arizonicus
Gray
syn. Cirsium arizonicum var. arizonicum
3
Species
benedictus
L.
common name:
blessed thistle, holy thistle
4
Species
breweri
Gray
5
Varietas
vaseyi
Gray
syn. Cirsium hydrophilum var. vaseyi
6
Species
calcareus
M.E. Jones
syn. Cirsium calcareum
7
Species
drummondii
(Torr. & Gray) Gray
8
Varietas
acaulescens
Rydb.
syn. Cirsium tioganum var. tioganum
9
Species
ochrocentrus
(Gray) Gray
syn. Cirsium ochrocentrum
10
Species
parryi
Gray
syn. Cirsium parryi ssp. parryi
11
Species
tioganus
Congd.
syn. Cirsium tioganum var. tioganum
12
Species
undulatus
Gray
13
Varietas
megacephalus
Gray
syn. Cirsium undulatum var. undulatum
14
Species
wheeleri
Gray
syn. Cirsium wheeleri
Individual specimen entries are published in the sample database supplied with
The Compleat Botanica for species or varieties of this supra-generic taxon.
Additional information is available in the commercial version
of The Compleat Botanica software for species with this symbol.
Internet standardsMemo must wordChanged simpleHow A Simple 500-Word Memo Changed the Way We Talk About the Internet In March of 1997, Scott Bradner penned a short memo titled 'Key Words For Use in RFCs to Indicate Requirement Levels'. It is more commonly referred to as simply RFC 2119.