GOOSEFOOT FAMILY 249 



pistillate flowers in axillary clusters, the staminate ones in short crowded ter- 

 minal spikes; fruiting bracts about 4 mm. long. Alkaline valleys: Colo. Son. 

 My-Au. 



28. A. oblanceolata Rydb. Suffruticose perennial, with decumbent base 

 and ascending branches, about 2 dm. high; leaves 2-3 cm. long, obtuse or acutish; 

 pistillate flowers in small axillary clusters; fruiting bracts ovate in outline, 

 slightly dentate, tubercled or irregularly crested on the back. Alkaline or 

 clayey flats: Mont. — -Colo. Plain. Jl-Au. 



29. A. Nuttallii S. Wats. Suffruticose or shrubby perennial; stems 3-6 

 dm. high, branching near the base; leaves 2-5 cm. long; pistillate flowers in 

 axillary clusters; fruiting bracts ovate or orbicular, 3-4 mm. long, irregularly 

 toothed, muricate or tooth-crested on the faces. Plains, bad-lands, and arid 

 valleys: Sask. — Neb. — Colo. — -Nev. — -Ida. Plain — Suhmont. Je-S. 



30. A. falcata (M. E. Jones) Standi. Suffruticose perennial; stem 2-5 

 dm. high, with ascending branches; leaves 1.5-5 cm. long, 2-7 mm. wide; flower- 

 clusters both axillary and in terminal spikes; fruiting bracts 5-8 mm. long, entire- 

 margined or sparsely dentate at the apex, united to near the tip, often muricate 

 or tuberculate below. A. N utlallii falcata and A. Nuttallii anomala M. E. Jones. 

 Plains and hillsides: Wash. — Ida. — -Utah — -Nev. Son. 



31. A. cuneata A. Nels. Suffruticose perennial; stem branched near the 

 base, decumbent; leaves numerous, petioled; leaf-blades 1-3 cm. long; pistillate 

 flowers in axillary clusters; fruiting bracts ovate or suborbicular, irregularly 

 toothed and with thick flattened processes on the faces. Arid plains: sw Colo. 

 — Utah — N.M. — Ariz. Suhmont. Je-Jl. 



32. A. biJfxifolia Rydb. Suffruticose perennial; stem branched near the 

 base, with simi)le branches, 3-4 dm. high; leaves thick, 1-2 cm. long; pistillate 

 flowers in axillary clusters; fruiting bracts ovate, acute, 4-5 mm. long, toothed 

 on the margins and with thick, often flattened processes on the faces. Dry 

 plains: W3'o. Suhmont. Au. 



33. A. Garrettii Rydb. A low shrub, with straw-colored branches; leaves 

 short-petioled, oval, grayish on both sides; flowers in axillary and terminal clus- 

 ters; bracts 8 mm. long and as broad, 4-winged, coarsely toothed, sometimes 

 with processes on the back; free portion 1-2 mm. long. Hills: se Utah. Son. 

 Jl. 



34. A. aptera A. Nels. A shrubby perennial; stems with shining, white, 

 more or less flaky bark, 1-4 dm. high; leaves narrowly oblanceolate to oblong, 

 acute or obtuse, 2-4 cm. long, entire; pistillate flowers axillary; fruiting bracts 

 3-4 mm. broad, reticidate and ribbed. A. odonlopteraRydh. Sahne flats: Alta. 

 — Colo. Plain — Suhmont. Jl-Au. 



35. A. canescens (Pursh) Nutt. Shrubby perennial; leaves 2-5 cm. long; 

 pistillate flowers axillary, short-pedicelled, the staminate clusters in subterminal 

 spikes; fruiting bracts orbicular in outhne, when fully developed 12-15 mm. 

 broad. Dry mesas and alkaline valleys: S.D.— Kans.— N.M. — Calif. — Ore. 

 Plain — Suhmont. Je-Au. 



36. A. tetraptera (Benth.) Rydb. Shrubby perennial; stem 6-10 dm. high, 

 white, branched; leaves 2-4 cm. long; pistillate flowers axillary, the staminate 

 clusters forming subterminal spikes; fruiting bracts about 1 cm. broad, strongly 

 reticulate. Desert regions: s Utah — Ariz. — -s CaUf. — Nev. L. Son. Ap-Jl. 



37. A. occidentalis (Torr.) D. Dietr. Shrubby perennial; stem 5-20 dm. 

 high, divaricately branched and somewhat spinose; leaves 2-4 cm. long, 2-5 mm. 

 wide, linear or oblanceolate, obtuse or even retuse; pistillate flowers axillary, 

 the staminate clusters forming terminal panicles; fruiting bracts 16-18 mm. 

 broad. Arid plains: Tex. — Colo. — -Utah — Ariz.; n Mex. Son. Mj'-Jl. 



8. ENDOLEPIS Torr. 



Monoecious or dioecious annual herbs. Staminate flowers ebracteate in 

 glomerate terminal spikes; calyx gamosepalous, urceolate, 5-lobed, each lobe 



