120 CHENOPODIACEAE. 



separate or united by their bases; a rudimentary ovary sometimes present. 

 Pistillate flowers subtended by 2 bractlets which enlarge in fruit and are more 

 or less united, sometimes quite to their summits; perianth none; stigmas 2. 

 I^triele completely or partially enclosed by the fruiting bractlets. Seed vertical 

 or rarely horizontal; embryo annular; endosperm mealy. [Prom a Greek 

 name of orache.] About 150 species, of wide geographic disribution. Type 

 species: Artiplex hortensis L. 



Leaves, at least some of them, toothed. 



Sides of the bracts tubercled or crested. 1. A. pentandra. 



Sides of the bracts unappendaged. 2. A. domingensis. 



Leaves, entire. 3. A. arenaria, 



1. Atriplex pentandra (Jacq.) Standley, N. A. PI. 21: 54. 1916. 



Axyris pentandra Jacq. Sel. Stirp. Am. 244. 1763. 

 Atriplex cristata H. & B.; Willd. Sp. PI. 4: 959. 1806. 



Annual or perennial, branched, the branches procumbent or ascending, 3-8 

 dm. long, scurfy when young, becoming glabrate. Leaves alternate, sessile or 

 short-petioled, oblong to rhombic or obovate, 1-3 cm. long, obtuse or acute at 

 the apex, mucronate, cuneate at the base, repand-dentate, undulate or the upper 

 entire, white-scurfy beneath, green above; flowers monoecious, the staminate 

 in dense short terminal spikes, the pistillate clustered in the axils; fruiting 

 bracts cuneate-orbicular, about 3 mm. long, united only at the base, sharply 

 dentate, the sides bearing 2 dentate crests or irregularly tubercled; seed brown. 



Coastal rocks and sands, throughout the archipelago from Great Bahama south 

 to Andros, Mariguana, Atwood Cay, and Grand Turk: — ^Florida; Cuba to St. Jan; 

 Jamaica ; Curagao ; Venezuela and Colombia to Peru. Chested Ateiplex. 



2. Atriplex domingfinsis Standley, N. A. PI. 21 : 55. 1916. 



Annual, woody, much .branched, the branches decumbent, 'spreading, scaly, 

 2 dm. long or longer. Leaves alternate, nearly sessile, deltoid or deltoid- 

 oblong, small, 4^6 mm. long, 1-2 mm. wide, denticulate or entire, acute at the 

 apex, crisped, thick, white-scaly on both sides; flowers monoecious, the stami- 

 nate in terminal spikes, the pistillate 2-4 together in axillary clusters; bracts 

 cuneate, 2 mm. long, coarsely 5-toothed above, their sides unappendaged; seed 

 dark brown. 



White-lands, Eastern Cay, Turk's Islands : — Hispaniola. Domixgan Ateiplex. 



3. Atriplex arenaria Nutt. Gen. 1: 198. 1818. 



Atriplex cristata arenaria Kuntze, Eev. Gen. PI. 546. 1891. 



Annual, pale, stem densely silvery-scurfy, bushy-branched, 1-4.5 dm. high, 

 the branches ascending or decumbent, angular. Leaves oblong to obovate, 

 entire, short-petioled or sessile, 1-4 cm. long, whitish-scurfy beneath, the lateral 

 veins few and obscure; staminate flowers in terminal or axillary spikes; pis- 

 tillate flowers in axillary clusters much shorter than the leaves; fruiting bracts 

 triangular wedge-shaped, broadest above, 4-6 mm. wide, united nearly to the 

 several-toothed summits, their margins entire, their sides reticulated, or some- 

 times crested or tubercled. 



Coastal sands, Bleuthera, Anguilla Isles and Water Cay : — Nova Scotia to 

 Texas ; Bermuda ; Cayo Sabiual, Cuba. Sea-beach Ateiplex. 



3. DONDIA Adans. Pam. PI. 2: 261. 1763. 



Pleshy herbs or low shrubs, with alternate narrowly linear, thick or nearly 

 terete, entire sessile leaves, and perfect or polygamous bracteolate flowers, 



