6 NORTH AMERICAN FLORA [VorumE 21 
of the lower leaves spatulate, oblanceolate, or oblong, 2-5 cm. long, obtuse or acutish, tapering 
at the base to a short petiole, thin, bright-green, the blades of the upper leaves shorter, ovate- 
oblong to cordate-ovate, acute or acuminate, sessile by a clasping base; fruit 1.2-2 mm. broad ; 
seed 1-1.5 mm. in diameter, the margin rounded. 
TYPE Locality: Near San Diego, California. 
DISTRIBUTION: Coast of southern California and Lower California, and on the adjacent islands. 
ILLUSTRATION: E. & P. Nat. Pfl. 31°: f. 23. 
III. CHENOPODIEAE. Herbs or rarely shrubs, the pubescence usually of 
inflated or glandular hairs, or wanting. Leaves mostly alternate. Flowers 
usually glomerate, sometimes solitary, commonly paniculate or cymose; 
perianth-segments 3-5, sometimes 1 or 6-8, united at the base or nearly to the 
apex, unchanged or fleshy in age or sometimes winged horizontally in fruit. 
Stamens 1-5, free, or united at the base. Fruit compressed vertically or 
laterally. Seed vertical or horizontal; embryo annular or hippocrepiform. 
Stamen 1; perianth-segments 1, or 6-8. 
Perianth-segment 1; plants ‘not glandular-pubescent. 4, MONOLEPIS, 
Perianth-segments 6-8; plants glandular-pubescent. 5. MEIOMERIA. 
Stamens usually 3-5; perianth- -segments 3-5, 
Perianth horizontally winged in fruit. 6. CycLoLoma. 
Perianth not winged. 
Perianth reticulate-veined, shallowly dentate at the apex. 7. Rousieva. 
Perianth not veined, usually deeply lobed. 
Flowers not in spheric, spicate heads; perianth slightly if at all 
fleshy, never baccate; seed horizontal or vertical. 8. CHENOPODIUM. 
Fiowers in spheric, spicate heads; perianth fleshy, baccate, and 
bright-red at maturity; seed vertical. 9. Buirum. 
4. MONOLEPIS Schrad. Ind. Sem. Hort. Goetting. 1830: 4. 
1830.—Linnaea 6: Lit.-Ber. 73. 1831. 
Branched annual herbs. Leaves petiolate or sessile, the blades entire or hastate. Flowers 
polygamous, ebracteate, densely clustered in axillary glomerules, or sometimes solitary. 
Perianth-segment 1, rarely wanting, persistent, unchanged in fruit. Stamen 1 or wanting. 
Stigmas 2, subulate, connate at the base. Utricle ovoid, compressed, the cells of the pericarp 
conspicuous, the pericarp slightly adherent to the seed. Seed erect, compressed; embryo 
annular, surrounding the endosperm; radicle inferior. 
Type species, Chenopodium trifidum Trev. 
Leaf-blades hastately lobed; sepals acute. 1. M. Nuttalliana. 
Leaf-blades entire; sepals obtuse. 
Flower-clusters 10-20-flowered; leaf-blades narrowly spatulate, 5-15 mm. 
long. 2. M. spathulata. 
Flower-clusters 1—5-flowered; leaf-blades oblong to obovate, 2-8 mm. long. 3. M. pusilla. 
1. Monolepis Nuttalliana (Schultes) Greene, Fl. Franc. 168. 1891. 
Blitum chenopodioides Nutt. Gen. 1: 4. 1818. Not B. Seedire page aur 1783. 
Blitum Nuttallianum Schultes, in R. & S. Syst. Veg. Mant. 1: 182 
Chenoge sem trifidum Trev. ‘Ind. Sem. Vratisl. 1829 -—Mog. Gee Enum. 45, as synonym. 
840. 
Monolepi trifida Schrad. Ind. Sem. Hort. Gotting. 1830: 4. 1830.—Linnaea 6: Litt.-Ber, 73. 
Bliture Ny iilianies minus Mog. Chenop. Enum. 45. 1840. 
Monolepis chenopodioides Moq. in DC. Prodr. 13%: 85. 1849. 
Monolepis chenopodioides trifida Moq. in DC. Prodr. 13*: 86. 1849, 
Chenopodium arcticum Mog. in DC. Prode. 13?: 86, assynonym. 1849. 
Monolepis asiatica Mogq. in DC. Prodr. 13?: 86. 1849, 
Stems stout, succulent, ascending, much branched, 8-30 cm. high, somewhat farinose 
when young, glabrate in age; petioles 0.5-5 cm. long, or the upper leaves sessile; leaf-blades 
triangular to lanceolate or narrowly oblong, 1—6.5 cm. long, hastately lobed at the base, the 
Jatéral lobes divergent, the terminal lobe entire or coarsely and remotely dentate, obtuse or 
acutish, succulent, narrowed at the base and decurrent, sparsely farinose when young, the 
uppermost blades sometimes entire; flower-clusters sessile, densely many-flowered, often 
