170 
The Pogoniris Section 
DISTRIBUTION. The origin of this plant is not really known and the statement found in Baker and elsewhere 
that it comes from Bosnia is probably based on Kummer und Sendtner’s statement in Flora XXXli. p. 763 
(1849) that specimens were found on Mt. Vlassich (? = Vla 3 ic Planina). Asch. und Graebn. (Syn. in. p. 475 
(1906)) make this plant synonymous with their I. virescens var. bosniaca (see I. Rcichenbachii (p. 151)), but 
this identification can hardly be correct for Kummer und Sendtner say that it is similar to I. squalens 
except in the colour of the falls, which are yellow with pale veins. This points to its being a form of 
I. vanegata, cf. I. leucographa (p. 160). 
The frequently repeated statement that I. Jlavcsccns is a native of the Caucasus is due to its erroneous identi- 
fication with I. imbricata Lindl. (see p. 179). It is doubtless a garden hybrid and has no real claim to 
specific rank. 
Description. 
Rootstock, a stout rhizome. 
Leaves , ensiform, glaucous, about 12 — 15 in. long at flowering time by 1 — 1£ in. broad, withering 
away almost entirely in late autumn. 
Stem, twice as long as the leaves, bearing 3 — 4 heads of flowers in a fuller inflorescence than 
that of /. germanica. 
Spathes, 2 — 3 flowered, largely but not entirely scarious at flowering time, about 1^ — 2 in. long. 
Pedicel, very short. 
Ovary , under £ in. long, with six slight grooves at equal intervals. 
Tube, about | — 1 in., rounded trigonal. 
Falls, obovate cuneate, 2| in. long by i£ in. broad; the blade is of a very pale yellow, almost 
white, with slight brownish veins which are most marked in the neighbourhood of the beard. Along 
the haft, the brown veins become much bolder. The beard is pale yellow tipped with orange in 
front, becoming more wholly orange behind. 
Standards, obovate unguiculate, pale lemon yellow, slightly yellower than the falls ; the haft is 
slightly veined with brown at the base and bears a few scattered hairs, often on only one of the three 
standards. 
Styles, keeled, pale yellow, oval. 
Crests, large, broadly trigonal, with coarsely toothed edge. 
Stigma, entire. 
Filaments, colourless, longer than the anthers. 
Anthers , cream. 
Pollen, white. 
Capsule, 
Seeds, 
Observations. 
This Iris is very commonly grown in gardens, where it flowers in May immediately after 
/. germanica. As has been already pointed out, it has long been confused with /. imbricata, from 
which it is easily distinguished by its ampler inflorescence, by the colour of the flowers and by 
the scarious and not inflated membranous spathes. 
It is probably of hybrid origin and I have it on the authority of Mr C. J. Bliss that it once 
appeared in his garden as one of the seedlings resulting from a cross between the pallida variety 
" Queen of May ” and the amoena “ Thorbeck." This points to its being a hybrid of I. pallida 
or /. variegala. 
I have never yet been able to induce I. flavescens to set seed even with artificial pollination — 
a fact which may also point to its hybrid origin. 
t /. Kochii 
(Plate XXXVI) 
A. Kerner ; Stapf in Verh. Zool. bot Gesell. Wien, xxxvn. p. 649 (1887). 
Baker, Hdk. Irid. p. 35 (1892). 
Cf. also the note on I. germanica var. australis on p. 164. 
DISTRIBUTION. 1 have seen no herbarium specimens of this Iris except the original set prepared by Kemer, 
which were described by Dr Stapf. These specimens are now in the Herbarium of the Botanisches Institut 
of the University of Vienna and were gathered in 1872 from plants cultivated in the garden there which 
had been received in 1871 from Tommasini, with the information that they grew on rocky ground near 
Trieste and Rovigno. 
Description. 
Rootstock, a fleshy rhizome, resembling that of /. germanica. 
Leaves, 12 — 15 in. long, ensiform, slightly glaucescent. 
Stem, about 18 in., bearing a terminal head of two flowers and about two lateral flowers. 
