72 NORTH AMERICAN FLORA (VorumE 21 
sessile or very shortly pedicellate, lanceolate or ovate, 4-6 mm. long, indurate, bearing 4 
wings, these 3 mm. wide or less, irregularly dentate or laciniate, densely furfuraceous, the 
free tips of the bracts much exceeding the wings, green, the body of the bracts sometimes 
tuberculate; seed brown, 1.5-2 mm. long, the radicle superior. 
TypE LocaLity: Alkaline soil about Guaymas, Sonora. 
DistTRrmvuTion: Alkaline plains or hillsides, southern Arizona and southeastern California to 
Sonora and Lower California. 
103. Atriplex macropoda Rose & Standley, sp. nov. 
Erect shrub, much branched, the branches slender, spreading or ascending, angled, densely 
whitish-furfuraceous; leaves numerous, sessile, the blades linear, 0.8-1.8 cm. long, 1.5 mm. 
wide, obtuse, revolute, densely white-furfuraceous; flowers dioecious, the staminate glomerules 
in stout, dense or interrupted, naked, simple or paniculate spikes, the pistillate flowers soli- 
tary or in few-flowered clusters, axillary or in terminal naked spikes; calyx 5-cleft, densely 
furfuraceous; fruiting bracts on slender pedicels 4-7 mm. long, ovoid, united nearly to the 
apex, indurate, 6-10 mm. long, 4-winged on the back, the wings 2-4 mm. wide, deeply lacini- 
ate, the teeth attenuate to a usually subulate tip, the free portion of the bracts 2-4 mm. long, 
oblong to triangular, acute or obtuse, much exceeding the wings; seed reddish-brown, 1.5 mm. 
long, the radicle superior. 
< Type collected on Pichilinque Island, Lower California, March 27, 1911, J. N. Rose 16518 
(U. S. Nat. Herb. xo. 638567). 
12. ZUCKIA Standley, Jour. Wash. Acad. Sci. 5: 58. 1915. 
Low erect shrubs, with a copious covering of whitish inflated trichomes. Leaves numerous, 
alternate, petiolate, the blades flat, entire. Flowers dioecious, the pistillate ones sessile, 
solitary or in small glomerules forming short interrupted naked paniculate spikes, each flower 
bibracteolate, the bractlets accrescent in age, united except for a small aperture at the depressed 
apex, slightly inflated, thin, depressed vertically, 6-carinate vertically, 2 of the keels broader 
than the others and winglike; perianth none. Ovary depressed-globose; stigmas 2, filiform, 
exserted, connate at the base. Utricle included in the bracts, the pericarp membranaceous. 
Seed horizontal, the testa membranaceous; embryo annular, surrounding the copious endo- 
sperm; radicle centrifugal. 
Type species, Zuckia arizonica Standley. 
1. Zuckia arizonica Standley, Jour. Wash. Acad. Sci. 5: 58. 1915. 
Plants 1.5-4 dm. high, fruticose nearly throughout, copiously branched, the branches 
slender, erect, striate, the older ones gray or brown, the younger ones stramineous and densely 
furfuraceous; leaf-blades oblong-oblanceolate or spatulate-oblanceolate, or the uppermost 
linear-oblanceolate, 1-2 cm. long, 1.5-7 mm. wide, obtuse to acutish at the apex, attenuate 
at the base to a short stout petiole, thick and somewhat coriaceous, grayish-furfuraceous; 
pistillate spikes much interrupted, divaricate, forming nearly naked panicles 5-12 cm. long 
and 2-6 cm. wide; fruiting bractlets 4-5 mm. broad, densely furfuraceous, the 6 keels acute, 
two of them usually 1-1.5 mm. wide and winglike; utricle furfuraceous; seed orbicular, com- 
pressed, 2 mm. in diameter, yellowish-brown, dull. 
TypeEz LocALIty: Chalcedony Park (the Petrified Forest), eighteen miles southeast of Hol- 
brook, Arizona, . . 
DISTRIBUTION: Vicinity of the type locality. 
13. ENDOLEPIS Torr.; A. Gray, Pacif. R. R. Rep. 12?: 47. 1860. 
Annual herbs with much branched stems, the herbage and branches densely or sparsely 
furfuraceous or farinose. Leaves alternate, sessile or petiolate, succulent, the blades entire or 
dentate, or hastate. Flowers polygamous or dioecious, glomerate or solitary in the axils or 
in terminal spikes, the staminate near the ends of the branches. Staminate flowers ebracteate 
and ebracteolate, the calyx 5-cleft, the lobes obtuse or acute, smooth or cristate on the back; 
stamens 5, the filaments slender, subulate. Pistillate flowers with a calyx of 3 or 4 entire or 
