Part 1, 1916] CHENOPODIACEAE 31 
HYBRIDS 
In Europe in recent years there have been described numerous hybrids between various 
species of Chenopodium, and in several cases hybrids between a species and a hybrid, or even 
between two hybrids. Most of them are known only from cultivated plants. For a collec- 
tive account of these see Ascherson & Graebner’s Synopsis der Mitteleuropdischen Flora. 
So far, no hybrids have been worked out in North America. ‘The following are some of the 
better known hybrids between species that occur in North America: Chenopodium album X 
opulifolium (= C. viride) Murr, Deuts. Bot. Monats. 19:38. 1901; C. Berlandiert X hircinum 
A.Ludw.; Asch. & Graebn. Syn. Mittel-Eur. Tl. 5: 87. 1913; C. album X Berlandiert Murr, 
Allg. Bot. Zeits. 19:13. 1913; C. album X hircinum A, Ladw.; Asch. & Graebn. Syn. Mittel- 
Eur. Fl. 5: 88. 1913; C. glaucum X rubrum M. Schulze; Murr, Allg. Bot. Zeits. 12: 111. 
1906. 
DOUBTFUL SPECIES 
CHENOPODIUM BOLIVIANUM Murr, Magyar Bot. Lap.1:359. 1902. The type was collected 
in Bolivia, but the author cites a second specimen collected near Fort Colville, Washington. 
The plant from Washington is probably a form of C. Fremoniz. 
9. BLITUM L. Sp. Pl. 4. 1753. 
Morocarpus Adans. Fam. Pl. 2: 261. 1763. 
Glabrous annual herbs. Leaves alternate, petiolate, the blades usually hastate, entire or 
dentate. Flowers usually perfect, ebracteate, small, in dense globose axillary heads; perianth 
3-5-lobed, the segments concave, the calyx fleshy, baccate, and red at maturity, enclosing 
the fruit. Stamens 3-5, hypogynous, distinct, the anthers oblong. Style none; stigmas 
very short, stout; ovule subsessile. Utricle ovoid. Seed vertical; embryo hippocrepiform, 
surrounding the copious farinaceous endosperm. 
Type species, Blitum capitatum L,. 
Leaf-blades hastate, entire; glomerules of flowers 3-6 mm. in diameter. 1. B. hastatum. 
Leaf-blades hastate and dentate; glomerules 5-10 mm. in diameter. 
Inflorescence naked above; margin of the seed acute or acutish; plants branched 
from the base, the branches usually simple. 2. B. capitatum. 
Inflorescence leafy throughout; margin of the seed rounded; plants branched 
throughout. 3. B. virgatum. 
1. Blitum hastatum Rydb. Bull. Torrey Club 28: 273. 1901. 
Slender, bright-green, glabrous, erect or ascending annual, 1-4 dm. high, usually branched 
from the base, the branches simple or again branched; petioles of the lower leaves equaling or 
exceeding the blades, the upper leaves short-petiolate; leaf-blades ovate to lance-ovate in 
outline, entire, hastately lobed at the base, the lobes spreading or ascending, or the blades 
often not lobed, acute to acuminate at the apex, usually cuneate at the base, 3-7 cm. long, 
thin, bright-green, the uppermost blades reduced, elliptic or oblanceolate, tapering at the base, 
not hastate; flowers sessile in globose glomerules in the upper axils and in slender elongate 
interrupted terminal spikes, the spikes naked above, the glomerules 3-6 mm. in diameter; 
calyx deeply cleft, the lobes oval, obtuse, shorter than the fruit, becoming red and fleshy in 
age; stamens 5; styles short; seed slightly compressed, 0.8-1 mm. long, smooth, dark-brown. 
Tyree Locatity: Buffalo, Wyoming. . . : 
DistriBution: Moist soil in the mountains, Wyoming to Oregon, Nevada, and New Mexico. 
2. Blitum capitatum I. Sp. Pl. 4. 1753. 
Blitum tataricum Mill. Gard. Dict. ed. 8. Blitum no. 3. 1768. 
Morocarpus capitatus Scop. Fl. Carn. ed. 2.1: 6.) 1772. 
Blitum chenopodioides am. Encyc. 1: 431. 1785. . 
Blitum virgatum capitatum Coss. Germ. & Wedd. Introd. Fl. Paris 108. 1842. 
Chenopodium capitatum Asch. Fl. Brand. 1: 572. 1864. 
Glabrous, erect or ascending, bright-green annual, 1-6 dm. high, branched at the base 
the branches stout, usually simple; petioles of the lower leaves equaling or exceeding the blades’ 
15: 17-106. 1913. 
