POLYGONACEAE. 
113 
arctic swamps from Greenl. and Alaska to N. H. and Colo.; also Europe 
and Asia.—Alt. 8000-12,000 ft.—Alpine Tunnel; Grand Lake; Robinson; 
Seven Lakes; Little Kate Basin, La Plata Mountains; West Spanish Peak; 
Cameron Pass; Indian Creek Pass; White River Plateau; Gray’s Peak; 
North Park; Eldora to Baltimore; Beaver Creek; Cameron Pass; Gore 
Pass; Graymont. 
7. TINIARIA Reichenb. False Buckwheat. 
Outer sepals merely keeled at maturity. T. Convolvulus. 
Outer sepals developing conspicuous wings. T. scandens. 
1. Tiniaria Convolvulus (L.) Webb. & Moq. ( Polygonum Convolvulus 
L.) Among bushes from N. S. and B. C. to Fla. and Calif.—Alt. 4000-9000 
ft.—Box Canon, west of Ouray; Engelmann Canon; Fort Collins; Colorado 
Springs. 
2. Tiniaria scandens (L.) Small. ( Polygonum scandens L.) In thickets 
from N. S. to Mont., Fla., La. and Colo.—Exact locality not given. 
Order 24. CHENOPODIALES. 
Fruit a utricle, achene or anthocarp, indehiscent, circumscissile or bursting 
irregularly. 
Fruit a utricle. 
Stipules wanting. 
Bracts not scarious. 45. Chenopodiaceae. 
Bracts scarious. 46. Amaranthaceae. 
Stipules present, scarious. 47. Corrigiolaceae. 
Fruit an anthocarp, the achene surrounded by the tube of the corolla-like calyx. 
48. Allioniaceae. 
Fruit a capsule, dehiscent by apical or longitudinal valves. 
Ovary several-celled; corolla wanting. 49. Tetragoniaceae. 
Ovary i-celled; corolla mostly present. 
Sepals, 2; or, if more (in Lewisia), plant scapose, with fleshy basal leaves 
and the flowers solitary on a jointed scape. 50. Portulacaceae. 
Sepals, 4-5 ; plants leafy-stemmed. 
Sepals distinct; petals not clawed; ovary sessile. 51. Alsinaceae. 
Sepals united; petals clawed ; ovary more or less distinctly stipitate. 
52. Caryophyllaceae. 
Family 45. CHENOPODIACEAE Dumort. Goosefoot Family. 
Embryo annular. 
Stems and branches not jointed; leaves not scale-like. 
Flowers perfect, all with perianth, not inclosed in a pair of* bracts. 
Fruit inclosed in the calyx. 
Calyx in fruit not transversely winged. 
Sepals 3-5, stamens 1-5. 
Fruiting calyx herbaceous. 1. Chenopodium. 
Fruiting calyx fleshy, red. 2. Blitum. 
Sepals 1 ; stamens 1. 4. Monolepis. 
Calyx in fruit transversely winged. 
Flowers paniculate; leaves ample, sinuate, flat. 3. Cycloloma. 
Flowers spicate; leaves linear, terete. 9. Kochia. 
Fruit laterally flattened, exserted from the marcescent calyx. 
IO. CORIO SPERM UM. 
8 
