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■ (SPEC) Iris prismatica var. austrina Fernald

1947, Fernald

'Austrina' (Merit Lyndon Fernald, 1947) Originally described in Rhodora 49: 133 (1947).

See below:
Photo scanned from the Adele and Lewis Lawyer slide collectionPhoto by Dennis Kramb-SIGNA


Rhodora 49: 133 (1947) I. prismatica: leaves terminating new stolons 2-5 mm. wide, shallowly or obscurely corrugated; valves of spathe pale brown, wholly or partly scario-membranaceous, the outer one rarely foliaceous; flower 5-7 cm. broad, with perianth-tube about 3 mm. long; blade of sepal ovate or obovate to roundish, 1.3-2 cm. broad, rather abruptly contracted to the broad claw; faces of capsule 6-14 (av. 9.6) mm. broad; seeds 3-4 mm. long.

Var. austrina: leaves terminating new stolons 5-9 mm. wide, deeply corrugate-sulcate ; valves of spathe firm or subcoriaceous, either brown, or green and foliaceous; flower 8-10 cm. broad, with perianth-tube 5-6 mm. long; sepals spatulate-obovate, 1.2-1.7 cm. broad, the blade gradually tapering into the slender-based claw; faces of capsule 10-14 (av. 12.5) mm. broad; seeds 4-6 mm. long.



Chromosome counts






Distribution and Cultivation

Distribution: Region:


Photo scanned from the Adele and Lewis Lawyer slide collectionPhoto by Dennis Kramb-SIGNA

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-- BobPries - 2011-03-07
I Attachment Action Size Date Who Comment
Iris_prismatica01.jpgjpg Iris_prismatica01.jpg manage 73 K 11 Oct 2014 - 20:08 TerryLaurin Photo scanned from the Adele and Lewis Lawyer slide collection
IrisprismaticavaraustinaDKramb01.jpgjpg IrisprismaticavaraustinaDKramb01.jpg manage 52 K 11 Oct 2014 - 20:06 TerryLaurin Photo by Dennis Kramb-SIGNA
Topic revision: r7 - 05 Apr 2022, TerryLaurin
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