D. M. ANDREWS, BOULDER, COLO. 
15 
YUCCA. Liliaceae. Evergreen plants for deep, well-drained soil. May 
be placed in large rock gardens. 
Y. angustissima— *t Extremely narrow foliage, edged with curled fila¬ 
ments. rare. Each, $1.50. 
Y. baccata. * Broad-leaved resembling an agave. The Colorado form 
is hardy; a desert type and good drainage is essential. 75c; 3, $2.00. 
Y. Coloma. (Syn. Y. neomexicana.) * Desirable for the rock garden 
because of its small size. With its miniature rosettes of stiff bluish 
foliage and slender flower stems, no hardy species is more attractive. 
$1.00 each; 3 for $2.50. 
Y. filmentosa. Best known species, fls. creamy white. 75 cents. 
Y. filamentosa variegata. A hardy variegated type and a thrifty 
grower. The leaves have narrow stripes of green and white like a 
ribbon grass, tinged red in winter. 75c; 3, $2.00. 
Y. glauca. * The common yucca of the plains, known locally as 
Soapweed. The flowers are large and sometimes tinted purplish out¬ 
side. 50c; 3, $1.00. 
Y. glauca rosea. *t Very rare form, outside of perianth tinted rose, 
grown true from root cuttings. $1.50 each. 
Y. Harrimaniae. * The smallest and hardiest of all, the foliage 
glaucus-blue, forming compact many-leaved rosettes. A gem for the 
rock garden. Fine young plants, 50c; dozen, $3.50. 
Iris 
Iris dichotoma. An easily grown Iris species with a certain resemb¬ 
lance to the Blackberry Lily (Pardanthus) and requiring the same care. 
Blooms in August, in shades of light blue, and opens late afternoon. 
Strong flowering roots, 40 cents each. 
Iris Longipetala. $ A hardy California species like Missouriensis 
but larger in growth. The flowers are bright lilac and very showy. 
Rarely offered. 50c, 3, $1.25. 
Iris Missouriensis. * This native Iris has pale blue or lavender flow¬ 
ers in May, the 15-inch stems about equaling the foliage. It forms good 
clumps which should have a rather heavy soil, moist during the grow¬ 
ing season. 30 cents; dozen, $2.00. 
I. Missouriensis, Bluebird. A selected, vigorous type, the flowers 
deeper blue (color Bradley’s Violet), and freely produced. 40 cents; 3, 
$1.00; dozen, $3.00. 
I. Missouriensis, Snowbird. Equally hardy but not as tall; flowers 
pure white, no veining. 50 cents; 3, $1.25; dozen, $5.00. 
Iris pumila. Dwarf bearded, same culture as tall bearded. The fol¬ 
lowing varieties are offered at the uniform price, 3 of one kind, 50c; 
dozen, $1.25; Caerulea, pale blue; Bride, white; Orange Queen, yellow; 
Royal Purple, dark purple. 
IRIS SI BE RICA. Siberian Iris have no summer dormant season 
like the tall bearded iris so must be planted during spring or fall. They 
are excellent for brightening the borders of streams or ponds although 
they will thrive in most any part of the garden. A well watered soil 
rich in humus and slightly acid with full sun or light shade is recom¬ 
mended. A profusion of bloom on tall graceful stems emerging from 
grass-like foliage makes the Siberian Iris especially valuable for your 
garden. 
