44 AMARANTHACEAE. 



racemes. Calyx of 2 sepals, sometimes winged in fruit. Corolla of 5 often 

 somewhat colored petals. Androecium of 5 stamens borne opposite the 

 petals. Gynoecium 3-carpellary. Ovary superior, 1-celled. Fruit utricular. 



1. BOUSSINGAUIiTIA H.B.K. Vines. Leaf-blades of an ovate type, 

 rather fleshy. Eacemes axillary and terminal. Sepals 2, nearly flat, not 

 winged. Petals 5, longer than the sepals. Stigmas cleft. 



1. B. leptostachya Moq. A glabrous much branched vine. Leaf -blades ovate, 

 2.5-6 cm. long, acute, entire, abruptly narrowed or subcordate at the base: 

 racemes slender, 5-17 cm. long: petals greenish- white or maroon, oval or 

 elliptic-oval, 1.5-2.5 mm. long, spreading in anthesis. Waste places and road- 

 sides, Key West. Nat. of Trop. Am. [E. K.] (Cuba, Ant.) MADEIRA-VINE. 



FAMILY 3. AMARANTHACEAE. AMARANTH FAMILY. 



Herbs, shrubs, or trees. Leaves alternate or opposite, estipulate: 

 blades entire or nearly so. Flowers perfect, polygamous, or dioecious, in 

 spikes or panicles with scarious or colored bracts. Calyx of 2-5 mostly 

 distinct sepals. Corolla wanting. Androecium of 5, or fewer, distinct or 

 monodelphous stamens. Gynoecium of 2 or more united carpels. Ovary 

 1-celled. Fruit a utricle or pyxidium, or rarely baccate. 



Anthers 2-celled. 

 Leaves alternate. 



Filaments united at the base : ovules 2-8 in a cavity. 1. CELOSIA. 

 Filaments distinct : ovules solitary in each cavity. 



Perianth present in all flowers. 2. AMARAXTHUS. 



Perianth wanting in pistillate flowers. 3. ACXIDA. 



Leaves opposite. 4. ACHYBAXTHES. 



Anthers 1-celled. 



Stigmas capitate, notched or brush-like. 5. ALTERXAXTHERA. 



Stigmas 2-3, subulate or filiform. 



Flowers in head-like spikes, perfect. 6. PHILOXERUS. 



Flowers in panicles, dioecious. 7. IRESIXE. 



1. CELOSIA L. Herbs or shrubs. Leaves alternate: blades mainly 

 entire. Flowers perfect, spicate: sepals 5, scarious. Filaments partially 

 united. Styles united. Ovules 2-8. Utricle circumscissile. 



1. C. paniculata L. Perennial, glabrous, 1 m. long or more : leaf -blades ovate, 

 deltoid-ovate, or ovate-lanceolate, 1.5-7 cm. long: spikes 1-3 cm. long: sepals 

 oblong, 3.5-4 mm. long: utricle included: seed about 1 mm. long. Coastal 

 sand-dunes and hammocks, U. 8. keys, U. keys, L. keys. [E. K.] (Bah., 

 Cuba, Ant.) 



2. AMARANTHUS [Tourn.] L. Herbs. Leaves alternate: blades 

 entire. Flowers polygamous, monoecious, or dioecious, densely spicate or 

 clustered, each subtended by mostly 3 bracts. Sepals 2-5. Filaments dis- 

 tinct. Stigmas 2 or 3, distinct. Ovule solitary. Utricle circumscissile, 

 irregularly opening or indehiscent. AMARANTH. PIGWEED. 



Sepals abruptly contracted into narrow claws. 1- A. polygonoides. 



Sepals not abruptly contracted into claws. 

 Utricle circumscissile. 



Stem and branches unarmed, without spines at the leaf- 

 axils. 2. A. hybridus. 

 Stem and branches armed, with spines at the leaf-axils. 3. A. spinosus. 

 Utricle indehiscent. 



Flowers, at least the upper ones, in continuous or inter- 

 rupted spikes. 4. A. gracilis. 

 Flowers in axillary clusters surpassed by the leaves. 5. A. crassipes. 



