CHENOPODIACEAE. 109 



carpels, the ovary mostly superior. Fruit au acliene, a utricle, a capsule, 

 or a berry, or sometimes an antliocarp. 



Fruit a utricle, achene, or berry, sometimes an anttiocarp, not valvate, or merely 

 circumscissile. 

 Fruit utricular, the carpels not whorled. 



Bracts not scarious : stipules wanting. Fam. 1. Chenopodiaceae. 



Bracts, or stipules, scarious. 



Stipules wanting : sepals scarious. Fam. 2. Amaeantiiaceae. 



Stipules present : sepals herbaceous or scari- 



ous-margined. Fam. 3. Corrigiolaceae. 



Fruit baccate, the carpels whorled. Fam. 4. Phytolaccaceae. 



Fruit a capsule dehiscent by apical or longitudinal 

 valves. 

 Ovary several-celled : corolla wanting. Fam. 5. Teteagoniaceae. 



Ovary 1-celled : corolla mostly present. 



Sepals 2 : leaves mostly alternate. Fam. 6. Poetulacaceae. 



Sepals 4 or 5 : leaves mostly opposite. 



Sepals distinct : ovary sessile : petals not 



clawed. Fam. 7. Alsinaceae. 



Sepals united : ovary stipitate : petals clawed. Fam. 8. Caryophyllaceae. 



Family 1. CHENOPODIACEAE. Goosefoot Family. 



Herbs or woody plants. Leaves alternate or opposite : blades simple. 

 Flowers perfect, polygamous, monoecious, or dioecious, mostly in elongate 

 spikes or panicles. Calyx of 1-5 persistent sepals. Corolla wanting. 

 Androecium of as many stamens as there are sepals. Gynoecium of 2 or 

 more united carpels. Ovary 1-eelled. Fruit a utricle, sometimes achene- 

 like. 



Flowers perfect : calyx always present. 



Sepals hooded, usually keeled at maturity : embryo forming a circle : mealy 

 plants, odorless or heavy scented. 1. Chenopodium. 



Sepals flat or merely concave : embryo not forming a circle : 



glandular plants, aromatic. 2. Ambeina. 



Flowers dioecious or monoecious : calyx wanting in the pistil- 

 late flowers. 3. Ateiplex. 



1. CHENOPODIUM [Touru.] L. Odorless or heavy-scented non-glandu- 

 lar herbs, ours annuals. Leaves alternate: blades entire to coarsely toothed, 

 often mealy-coated. Sepals hooded. Anther-sacs commonly separate. Ovary 

 often depressed. — Goosefoot. Pigweed. 



Seed horizontal. 



Seed and pericarp firmly attached together. 



Flowering branches longer than the accompanying leaves : mature sepals 

 keeled. 

 Leaf-blades coarsely shallow-toothed or entire, gradually narrowed at 

 the base. 

 Inflorescence dense : mature calyx 2. .5-3 mm. broad : utricle fully 1.5 



mm. wide : leaf-blades decidedly mealy beneath. 1. C. ulhum. 

 Inflorescence lax : mature calyx 2-2.5 mm. wide : 

 utricle less than 1.5 mm. wide : leaf-blades 



scarcely, if at all, mealy. 2. C. lanccolatum. 



Leaf-blades sinuately deep-toothed, with the teeth 



salient, rounded or cordate at the base. 3. C. hybridnm. 



Flowering branones shorter than the accompanying leaves : 



mature sepals not keeled. 4. O. murale. 



Seed and pericarp easily separable from one another. 5. C. Boscianum. 



Seed vertical. 6. C. glaucum. 



1. C. album L. Plants stout, pale-green, copiously mealy, 6-30 dm. tall: leaf- 

 blades ovate and somewhat rhombic to broadly lanceolate, coarsely toothed, 2-8 

 cm. long: inflorescence compact, the flower-clusters mostly contiguous, becom- 

 ing 6-8 mm. thick: seeds about 1.5 mm. wide. — Common, in waste places, and 

 cultivated grounds. Nat. of Eu. — Sum. and fall. — Lamb 's-quakters. 



