Historic Tall Bearded Iris PURISSIMA

Purísima means "purest" in Spanish and is most commonly used in Spanish to refer to La Purísima Concepción (the Immaculate Conception) of the Virgin Mary. Historical misspelling in English resulting in double "s" which, as you can see is how the Iris was registered.Well used in iris breeding in the Thirties, Forties, and Fifties.
Has a New Zealand connection, first used by Jean Stevens in  her 1936 breeding programme as a pod parent and the first cross recorded was M7 Purissima X Inspiration although no seedlings were finally selected. The hybridiser Pattie Levett who lived at the family homestead "Beccles" in a small North Island town called Bulls used Purissima in the parentage that produced a beautiful creamy white Tall bearded Iris 'Wychnor'.
In America, lets not forget Purissima was the Pod parent to that game changer of hybridising the amazing 'Snow Flurry'. Also parent of Helen McGregor, Her Grace, Mary Rich Lyon, Pike's Peak Pink, grandparent of Cahokia, Pierre Menard, and Sleighride.

Irises for Every Garden. History of Bearded Irises. Sydney B. Mitchell.
In the perspective of thirty-five years it is now possible to rate William Mohr the outstanding American breeder. Through is work with Iris mesopotamica and Foster's Kashmir White, American breeders were given in the late twenties such outstanding irises as Conquistador, bred from the diploid Juniata by the huge ungainly mesopotamica; El Capitan bred from Oriflame by mesopotamica; Purissima which came from a seedling of Caterina by Kashmir White crossed with Conquistador ; the epoch-making tetraploid plicata's, San Francisco and Los Angeles and many others.

Rainbow Fragments, J. Marion Shull, published 1931.
A List of Better Varieties. Whites.
The supreme white self has not yet appeared, and this group includes none that has earned a rating of 90 or more at the hands of any considerable number of judges. Kashmir White and White Queen have won the same rating as Taj Mahal, but the former is not always a dependable grower. Purissima though rated very highly by a very small number of judges, does not promise to live up to a somewhat over-pretentious name, since it does not appear to be purer white then the ubiquitous Florentina, with which everyone is familiar, however much finer it may be in other respects.

Cooley's Iris Gardens, Silverton, Oregon, Bearded, Japanese, Spanish and Dutch Irises, 1932.
Recent Novelties and Specialties
PURISSIMA
If you live in the Pacific Northwest, in California or in the South, by all means add this glorious white to your collection! Nothing that grows can compare with it when flowered under congenial conditions. Growers in colder and wetter sections of the country can also succeed with it, but it must have winter protection except in warm climates. A normally flowered stalk of Purissima is a never-to-be-forgotten sight...............................Each  $1.75

Quality Gardens, Iris, Freeport, Illinois. Iris 1933.
PURISSIMA (Mohr-Mitchell)
A pure white iris of great size and splendid form. Not hardy in all climates, but ideal for moderate or warm climates. We grow it perfectly by giving it winter protection, and it is well worth the effort. It is the only tender iris variety we list...........................................$1.00

Bulletin of the American Iris Society, January 1933, Number 46.
VARIETAL NOTES From England, Australia, and Elsewhere (editorial comments added).
PURISSIMA (Mohr-Mit.) The finest white. I cannot conceive of anything finer; 5-5½ft., perfect in every way. England.
Mr. Pilkington must be impatient to see the flock of American whites of which the New England Committee has selected Easter Morn, Polar King, and Venus de Milo as of equal interest to the connoisseur. Ed.

National Iris Gardens, Beaverton, Oregon, 20th Catalog, 1936.
PURISSIMA (Mohr-Mitchell, 1927) E, 48".
The finest pure white Iris. Roots are tender and it is not recommended for the more northern states (for which Easter Morn and Los Angeles are more suitable), but grows well on the Pacific Coast and south of the Mason & Dixon line. A normally flowered stalk is a never-to-be-forgotten sight. Perfectly branched with finely shaped flowers.

Carl Salbach, Berkeley, California. Iris and selected seed Specialities.1937.
PURISSIMA (Mohr-Mitchell). Although introduced ten seasons ago, this remarkable iris still blooms as the most perfect white, handicapped only by a touch of tenderness when grown in regions of severe wintering. Latest reports indicate perfect wintering in many regions, but it is definitely erratic in its bloom in the Midwestern and Eastern regions of the United States. Grows ideally where winters are mild. Pure white with great poise, fine form, and heavy substance. With the sun shining through it, it has the appearance of frosted glass. Ideal branching. Where the climate is mild, or where the quest for perfection outweighs the risk of no blooms, Purissima will be every bit as good as Bridal Veil and Snow King, the two new and hardy leaders in white, although all three are non-competitive, being different in type. We suggest yearly replacements with our fully mature rhizomes for the greatest probability of bloom in cold climates. Early. 50-inch. ---- 40c; 3 for $1.00

Stevens Bros, Bulls, New Zealand, Catalogue of Irises 1937-38.
PURISSIMA
This splendid flower still sets a mark of perfection and purity unequaled by any other iris. A pure white of great poise, fine form and heavy substance. With the sun shining through it, this has the appearance of frosted glass...........................................................4½ft.

Iris 'Purissima' in the garden of British Iris Society President G. L. Pilkington.
Illustration from The Iris Year Book 1938, insert facing page 52 

The Iris Yearbook (BIS), 1942, Bearded Flag Irises-An Initial Thirty, F.Wynn Hellings.
10. PURISSIMA. This superb Californian variety, a veritable queen, would have been in my first list (above) if it were not for the fact that some growers consider it tender in England. Its conduct in this garden has been exemplary, planted as it is in a position sheltered from north and east winds in soil lightened with sand. Its grave, statuesque beauty justifies this little extra care. It is early flowering, in fact in most years it is the first of the tall, bearded, May-June Irises to flower, only yielding in some years to HARMONY. The stems run to 5 feet in height and the branching is excellent. The flowers, which have a slight bluey tint at first, are perfect in form and are noticeably lasting,

AIS Checklist 1939
PURISSIMA (Mohr-Mitchell, R. 1927). TB, M. WW. Argentina X Conquistador.  Preliminary Commendation RHS 1933. Salbach 1927.

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Photo credit and copyright Iris Hunter.