''Iris'' ser. ''Longipetalae'' is a series of the genus '' Iris'', in ''Iris'' subg. ''Limniris''.

William Rickatson Dykes William Rickatson Dykes (4 November 1877 – 1 December 1925) was an English amateur botanist who became an expert in the field of iris breeding and wrote several influential books on the subject. He was also interested in tulips, amaryllis, and ...

in his book 'Handbook of Garden Irises' (of 1924) includes 4 species in his Iris longipetala subsection; including ''Iris longipetala'' (Herbert), ''Iris missouriensis'' Nuttall, ''Iris arizonica'' (Dykes, 1917) and ''Iris montana'' (Nuttall). ''Iris arizonica'' and ''Iris montana'' have since been classified as synonyms of ''Iris missouriensis''. The series was then first classified as a 'series' by

Diels Diels is the last name of several people: * Rudolf Diels (1900–1957), German politician * Otto Diels (1876–1954), German scientist noted for his work on the Diels–Alder reaction * Ludwig Diels (1874–1945), German botanist * Hermann Diels ...

in 'Die Natürlichen Pflanzenfamilien' (Edited by H. G. A. Engler and K. Prantl) in 1930. It was further expanded by Lawrence in Gentes Herb (written in Dutch) in 1953.James Cullen, Sabina G. Knees, H. Suzanne Cubey (Editors) There is still a lot of confusion within the series. The British Iris Society only lists ''Iris missouriensis'' and classes ''Iris longipetala'' as a variant of ''Iris missouriensis''. The American Iris Society and Pacific Iris Society lists three species; ''Iris longipetala'' (Herbert), ''Iris missouriensis'' (Nuttall) and ''Iris pariensis'' (Welsh).James Cullen, Sabina G. Knees, H. Suzanne Cubey (Editors) But Plant List regards ''Iris pariensis'' as a synonym of ''Iris missouriensis''. ''Iris pariensis'' was found by Stanley Larson Welsh in Utah and published in 'Great Basin Naturalist' 46(2): 256 in 1986. The series has species are native to western North America, seen in Washington (state), Oregon and California. They prefer to have moisture in the spring and a dry period during the summer. They also do not like root disturbance hence they are difficult to grow as nursery plants. They are also rarely grown in the UK. The species have thick rhizomes, fruiting stems (that follow the flowers) that stay on the plant until the next growing season, (or longer) a stigma with 2 teeth (or lobes) and seed capsules with 6 ribs and taper into points on the ends. *''

Iris longipetala ''Iris longipetala'' is a species in the genus '' Iris'', it is also in the subgenus '' Limniris'' and in the series '' Longipetalae''. It is a rhizomatous perennial, from North America. It has dark green or bluish green, grass-like leaves, sma ...

'' Herbert *''

Iris missouriensis ''Iris missouriensis'' (syn. ''I. montana'') is a hardy flowering rhizomatous species of the genus ''Iris'', in the family Iridaceae. Its common names include western blue flag, Rocky Mountain iris,Donald Wyman and Missouri flag. It is native ...

'' Nuttall

References

External links

* * {{Taxonbar, from=Q6070404 Longipetalae Flora of the United States Garden plants of North America