| Baker in Curtis's Botanical Magazine 116: tab. 7097. 1890, gives the following notes along with the color illustration; "This new bulbous Iris is known only on a single mountain in the south of Portugal, the Serra do Gerez, where it grows at an altitude of from two thousand to three thousand feet above sea-level. It belongs to the true Xiphions, the same group that includes the well-known English and Spanish Irises of gardens, with all their multiform variations in the size and coloring of the flower, and is nearest to I. filifolia, Boiss. (Xiphion filifolium, Hook. Fil. In Bot. Mag. T. 5928), which is also a native of the Spanish Penninsula. It differs, however, from all its neighbors in having a rudimentary beard, like that of a Pogoniris, down the keel of the lower part of the outer segments. There is a specimen in the Kew herbarium, collected by Winkler in 1876. It was first flowered in England in 1877 by Professor M. Foster, who received the bulbs from Mr. A. W. Tait of Oporto. Our drawing is made from material supplied by Messrs. Barr and Son, of Tooting and Convent Garden. It flowers in England at the beginning of June.
Descr. Bulb small, oblong, with thin brown outer tunics and a few fleshy root-fibers. Stem a foot long, slender, terete, simple, bearing at the base one or two subterete long-pointed green leaves a foot long, deeply channeled down the face, and higher up several others, which grow gradually smaller til the uppermost is entirely bract-like and adpressed. Spathe inflated, two inches long; valves greenish and moderately firm at the flowering time; pedicel very short. Flower scentless; ovary cylindrical, acutely trigonous, an inch long; perianth-tube green, slender, above an inch long; limb bright lilac, an inch and a half long; outer segments with an obovate reflexing blade, about as long as the cuneate claw, with a bright yellow keel down the face, which is furnished with a few gland tipped hairs like those of the beard of a Pogoniris; inner segments as long as the outer, erect, obovate-unguiculate, half an inch broad. Style-branches reddish-lilac, under an inch long; crests small, erect, deltoid. Anthers yellow, half an inch long."