365 
** Leaves not fleshy (except Monolepis), and stems not jointed (except under 
oa os + + ). 
+ Flowers usnally perfeet (polygamous in Monolepis), bractless, clustered or pan- 
ieled: calyx obvious: seed-coat crustaceous, 
s+ Seods horizontal (sometimes vertical in Chenopodium). 
3. Cycloloma. Calyx 5-cleft, in fruit surrounded by a horizontal continuous 
membranaceous wing: leaves sinuate-toothed, 
4. Chenopodium. Calyx 5 (or 2 or 3)-cleft or -parted, unchanged or becoming 
fleshy in fruit. 
++ ++ Seeds vertical. 
5. Monolepis. Sepal one, bract-like: stamen one: fruit naked: flowers dense in 
the axils. 
~ + Flowers moneecious or dimcious; staminate with 3 to 5-cleft calyx; pistillate 
without calyx, inclosed in a pair of more or less united bracts: seed vertical. 
++ Bracts compressed: seed-coat mostly coriaceous. 
6. Atriplex. Fruiting bracts with margins often dilated and sides often muricate. 
4+ 4+ Bracts obcompressed, completely united, not muricate: seed-coat membrana- 
ceous, 
7. Burotia. Fruit conical, densely hairy, turgid, not winged, 2-beaked. 
+ + Flowers perfect, naked or with 1 (rarely 2 or 3) sepals, solitary in the 
axils of the reduced upper leaves. 
8. Corispermum, Fruit oval, flattened, adherent to the vertical seed: leaves 
linear. 
_ + + + Flowers perfect, bractless, arranged by threes in close spikes: stamens 
1 or2: fleshy saline plants, with jointed stems and seale-like leaves. 
9, Salicornia. Flower clusters decussately opposite, sunk in the rachis of the 
spike: calyx utricle-like: branches opposite. 
10. Allenrolfea. Flower clusters spirally arranged: calyx 4 or 5-cleft, with keeled 
sepals: branches alternate. 
~~ +. + + + Flowers perfect, in axillary and terminal spikes, bracted: stems dex- 
trorse-twining. 
11. Anredera. Floral bracts 2-winged. 
1. SARCOBATUS Nees. (GREASEWOOD.) 
A rigidly and divaricately branched shrub, with linear leaves, naked 
staminate flowers in aments, axillary and solitary pistillate ones with 
saceate calyx which is adherent at the contracted somewhat 2-lipped 
apex to the base of the stigmas and laterally margined by a narrow 
erect slightly 2-lobed border which at length becomes a broad circular 
horizontal membranaceous veined wing, 2 to 5 stamens irregularly 
arranged under a stipitate peltate scale, and fleshy anthers. 
1. S. vermiculatus (Hook.) Torr. Erect, subspinescent, seraggy, 6 to 24 dm. 
high, leafy: branches with smooth white bark: staminate spikes terminal, the per- 
sistent scales spirally arranged, rhombic-ovate. (5, Mavimiliani Nees.)—From the 
Upper Platte to northwestern Texas, New Mexico, and the Great Basin. 
