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. TETRAGON IACEAE. 



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. i. CHENOPODIUM. 



Fruiting calyx fleshy, red. 2. BLITUM. 



Sepals i ; stamens i. 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. 



10. CORIOSPERMUM. 



8 



