Part 2, 1917] AMARANTHACEAE 131 
2. Tidestromia suffruticosa (Torr.) Standley, Jour. Wash. Acad. Sci. 
6:70. 1916. 
Alternanthera suffruticosa Torr. Bot. Mex. Bound. Surv. 181. 1859. 
Cladothrix suffruticosa S. Wats. Bot. Calif. 2: 43. 1880 
Erect perennial, suffrutescent at the base or nearly throughout, densely and finely grayish- 
pubescent with much branched hairs; stems 1-2.5 dm. high, much branched, the stout branches 
ascending, often swollen at the nodes; leaves short-petiolate, the blades orbicular-ovate to 
broadly oval, 0.4-2 cm. long, 0.3-1.2 cm. wide, obtuse or rounded at the apex, rounded or 
obtuse and asymmetric at the base, the lateral veins not prominent; glomertules few-flowered, 
the small subtending leaves sometimes united and indurate at the base in age; perianth 2 mm. 
long, the lobes narrowly oblong, obtuse or acutish, glabrous below, densely pubescent above; 
staminodia very short, rounded or emarginate; seed 0.5 mm. broad. 
TYPE LocaLity: Mountains between the Pecos and the Limpio, Texas. 
DIsTRIBUTION: Dry, rocky hillsides, western Texas and southern New Mexico to Coahuila, 
3. Tidestromia oblongifolia (S. Wats.) Standley, Jour. Wash. 
Acad. Sci. 6: 70. 1916. 
aan lanuginosa S. Wats. Bot. Calif. 2:43, in part. 1880. Not Achyranthes lanuginosa Nutt. 
Cladothrix oblongifolia S. Wats. Proc. Am. Acad. 17: 376. 1882. 
Cladothrix crypiantha S. Wats. Proc. Am. Acad. 26: 125. 1891. 
Perennial, densely and closely pubescent throughout with short, much branched hairs; 
stems erect, ascending, or decumbent, slender or stout, much branched, sometimes suffruticose 
at the base, 2-6 dm. long; leaves short-petiolate, the blades ovate-orbicular, broadly ovate, 
or oblong, 0.8-4 cm. long, 0.3-2 cm. wide, obtuse at the apex, rounded to acute at the base, 
prominently veined; glomerules few-flowered, the small subtending leaves in age usually indu- 
rate and united at the base to form an involucre; perianth 1 mm. long, 2-3 times as long as the 
bracts, the lobes oblong or oblong-ovate, obtuse or acutish, densely pubescent above; stami- 
nodia acute, about half as long as the filaments; seed 0.5 mm. long. 
Tyree LOCALITY: On the banks of the Colorado River near Chimney Peak, California. 
DISTRIBUTION: Dry, stony soil, southeastern California and Arizona to western Nevada. 
13. GOSSYPIANTHUS Hook. Ic. 1. 251. 1840. 
Lanate perennial herbs, from thick woody roots, the branches ascending or prostrate. 
Leaves mostly basal, rosulate, the blades narrow, entire. Flowers perfect, minute, glomerate 
in the axils of the leaves, densely lanate, bracteate and bibracteolate; bracts and bractlets 
subequal, hyaline; perianth 5-parted, the segments equal, acute or obtuse, firm. Stamens 5, 
the filaments subulate, united at the base into a short cup; staminodia none; anthers oblong, 
2-celled. Ovary ovoid or oblong, compressed; style short, the stigma emarginate; ovule 1, 
suspended from the apex of an elongate funicle. Utricle ovoid-oblong, membranaceous, 
indehiscent. Seed inverted, lenticular, the testa thinly crustaceous, smooth, lustrous; embryo 
annular, the endosperm farinaceous, the radicle superior. 
Type species, Gossypianthus rigidiflorus Hook. 
Bracts obtuse; caudex usually branched. : 
Cauline leaf-blades 4 mm. long or ‘less, sparsely sericeous beneath, shorter 
than the inflorescence; flowers capitate or very shortly spicate. 1. G. Brittonii. 
Cauline leaf-blades 7-20 mm. long, densely sericeous beneath, longer than . 
the inflorescence; flowers mostly in spikes, these longer than broad. 2. G. Sheldoni. 
Bracts acute or acuminate; caudex not branched. we 
Leaf-blades glabrous or nearly so, the basal ones acute; flowers distinctly . 
spicate, the spikes usually longer than broad. . . 3. G. tenuiflorus. 
Leaf-blades, at least the cauline ones, copiously villous-sericeous beneath, 
the basal ones rounded or obtuse; flowers merely capitate, or, if spicate, . 
the spikes very short. 4, G. lanuginosus. 
1. Gossypianthus Brittonii Standley, Contr. U. S. Nat. Herb. 
18: 92. 1916. 
Caudex much branched both above and below the surface of the soil, the branches stout 
or slender; stems numerous, prostrate, 4-9 cm. long, slender, lanate when young but soon 
