Iris vorobievii N.S. Pavlova (1987: 424)

Alexeeva, Nina B., 2018, A taxonomic revision of Iris section Psammiris (Iridaceae) in Russia, Phytotaxa 340 (3), pp. 201-216 : 205

1. Iris vorobievii N.S. Pavlova (1987: 424) .

Holotype:— RUSSIA. Prov. Primorskensis: distr. Chassan , prope Craskino in declivibus lapidosis, 2 June 1964, Stepanova, K. et al. (VLA 10388!) ( Fig. 3 ).

Description:— Rhizome vertical and short, 1 cm long, with a circlet of radially diverging adventitious roots. It does not form clumps . Leaves 15–20 × 0.8–1.8(2) cm, ensiform and equal to or longer than the scapes at flowering, and up to 35 cm long at fruiting, green. Flower scape 20–35 cm high with the base surrounded by many old leaves that persist as fibrous brown remains. Bracts herbaceous with a membranous edge. Flowers pale yellow with brown-veined patterns on the falls. Perianth tube one-half to one-third the length of the ovary. Capsule 3-sided, 5–5.5 cm long and 1.5–1.7 cm wide with a beak of about 0.5 cm; seeds 4.4 × 2.3 mm, dark brown, almost round, with a large aril.

Phenology: —Flowering in May, fruiting in late June–July. In cultivation does not produce any seeds.

Distribution: —Only one population of the species occurs in Russia, namely in the Primorsky Kray, in the southern Khasan district, just north of the village Kraskino. Abroad Russia it occurs in the Northeastern China and Northern Korea.

Habit and ecology: — Iris vorobievii grows on grassy hill slopes, in steppe meadows, among the grass under sparsely standing oaks or other trees.

Series 2. Humilis Doronkin (1990: 415) .

Rhizome creeping, forming loose clumps. Plants up to 20(25) сm tall. Leaves linear, green, narrow, 6–8 mm wide, arranged fan-like. Flowering scape distinct, 1–2-flowered, the flowers pedicellate. Perianth tube shorter than a blade. Aril much smaller than the body of the seed.

Type:— I. humilis Georgi

Figures

FIGURE 3. Holotype of Iris vorobievii (VLA 10388).