43 
The Apogon Section 
in the stigmas. That of I. bracteata is distinctly tongue-shaped, whereas that of /. Purdyi is truncate, 
so that it ends in a straight, horizontal line. 
Cultivation does not appear to be difficult when once the plant is established, but it is just as 
exacting as all the other Californian Irises with regard to the time at which it can be moved with 
success. This operation should always be carried out when growth is active in spring or early 
summer. With regard to soil, lime must be avoided and Purdy himself says' that it does best in a 
heavy soil in California. In England it certainly succeeds in well-nourished sand, but my experience 
of its behaviour in this soil during the drought of 1911 seemed to show that a more retentive soil 
would suit it better. 
Seed is set in abundance, if the flowers are artificially pollinated, and germinates readily. 
t XI. MACROSIPHON* 
(Plate XII) 
Torrey, Descr. Bot. Coll. p. 144 (in Pacific Rail. Rep. IV. 1857). 
Baker in J. L. S. XVI. 138 (1877). 
Hdk. Irid. p. 5 (1892). 
Purdy in The Garden, Jan. 1st, 1898. 
Synonyms. 
/. chrysophylla , Howell, Flora of N. W. America, I. 633 (1897). 
I have cultivated and flowered this plant for several years and cannot separate it as a species from 
/. macrosiphon Torrey, which is itself variable in size and colour. Of two specimens collected by 
Howell in the United States National Herbarium one has a six-inch stem while the other is 
practically stemless. 
I. Douglasiana , Torrey, BoL Whipple 144 (in Pacific Rail. Rep. IV. 1857). 
This was probably I. macrosiphon for Torrey observes that the perianth tube was longer than in the 
original Douglasian specimens and moreover it was collected at Corte Madera, where I. macrosiphon 
is still common. 
I. californica, Leichtlin, The Garden, Aug. 14th, 1897. 
Purdy, The Garden, Jan. 1st, 1898. 
Cf. also The Garden, Dec. 5th, 1896. 
I have raised this from seeds sent by Purdy and cannot find in it anything but a large form of 
I. macrosiphon. Cf. Heller’s specimens from Mt Sanhedrin (V) (B). 
[N.B. Beechey’s I. humilis (K) (cf. Hooker and Arnott, Vo y. Beech, p. 160) is a dwarf form of I. Douglasiana 
and not I. macrosiphon , with which it has been identified.] 
Distribution. California and Oregon. 
Purdy’s statement (cf. The Garden, Jan. 1st, 1898) that I. macrosiphon “begins where /. Douglasiana leaves 
off” seems to be inaccurate, for the type specimens were collected “just across the bay from San 
Francisco,” which would seem to mean Corte Madera and the slopes of Mt Tamalpais, where both the 
species grow. Moreover, I have it on the authority of Miss Alice Eastwood, the keeper of the San 
Francisco Herbarium, that both the species grow in this district. 
Both these species have many colour forms and it is curious to find that these forms are more or less 
constant and occur in separate colonies, as is shown in the following extracts. 
“At Ukiah and 120 miles south, only the lilac form (of I. macrosiphoti) is found. Eight miles east, this 
suddenly gives way to the creamy form and then to the white variety and then to the purple. In a 
cafton a few miles from Ukiah, there is said to grow every conceivable colour variation from sky blue 
to yellow” (Purdy in The Garden, Jan. 1st, 1898). 
“ At the lowest levels on Mt Tamalpais, the white-flowered form of /. Douglasiana appeared. Further up 
it became blue and further still pinkish mauve. Everywhere on the great mountain it peeps out under 
the ‘chaparal,’ the name given to the various medley of shrubs, which clothe the vast mass of rock 
and leave no space bare even to the summit” (E. R. Bernard in The Garden, Aug. 5th, 1911). 
Oregon. Douglas Co., 1881, Howell (B) (W). 
Abbot's Butte on boundary between Douglas Co. and Jackson Co., 1898, Applegate (W). 
Jackson Co., Ashland, 1886, Henderson (K). 
Siskiyou Mts, 1898, Applegate (W). 
Wimer, 1892, Hammond (W). 
Western Cascade Mts, 1902, Cusick (V) (B). 
California. Siskiyou Co., Marble Mt, 1901, Chandler (no. 1570) (W). 
Mendocino Co., Ukiah, 1866, Bolander (K) (BM) (V) (W). 
Round Valley, 1898, Chesnut (W). 
Lake Co., Mt Sanhedrin, 1902, Heller (V) (B). 
Between Lakeport and Hopland, 1903, Baker (K) (V). 
Placer Co., Auburn, 1865, Bolander (no. 4529) (W). 
Sonoma Co., Marsh Hot Springs near Santa Rosa, 1884, Holman (W). 
Windsor, 1902, Heller and Brown (W). 
Marin Co., Corte Madera, 1904, Heller (No. 7370) (W). 
Sausalito Hills, 1869, Kellog and Harford (W) (BM). 
San Mateo Co., Pescadero Creek, 1903, Copeland (V). 
1 Cf. The Garden, Jan. 1st, 1898. 
8 From ^laicpoj long and <ri</>u>v a tube. 
6 — 2 
