592 



AMARANTHACEAE. 



Acnida tamariscina prostrata Uline & Braj-, Bot. Gaz. 20: 158. 1895. 



Stems diffuse and prostrate or sometimes ascending; leaves rarely over i' long, spatulate; 

 flowers in axillary clusters or in separated glomerules. Michigan and South Dakota to Missouri. 



3. CLADOTHRIX Nutt.; Moq. in DC. Prodr. 13: Part 2, 359. 1849. 



Annual or perennial diffusely branched stellate-pubescent herbs, with opposite entire or 

 slightly undulate petioled leaves, and very small perfect 3-bracted flowers, solitary or clustered 

 in the axils. Calyx of 5 equal pilose erect dry oblong i -nerved sepals. Stamens 5, hypogy- 

 nous, their filaments united at the base, their anthers i-celled. Ovary subglobose; style short; 

 stigma capitate or 2-lobed. Utricle globose, indeiiiscent. [Greek, branch-hair, from the 

 stellate pubescence.] 



About 4 species, natives of southwestern North America and Mexico. 



i. Cladothrix lanuginosa Nutt. Cladothrix. 

 (Fig. 1411.) 



Achyranthes lanuginosa Nutt. Trans. Am. Phil. Soc. (II.) 



5: 1 66. 1833-37. 

 Cladothrix lanuginosa Nutt.; Moq. in DC. Prodr. 13: 



Part 2, 360. 1849. 



Perennial, somewhat woody at the base, or sometimes 

 annual, stem terete, much branched, sometimes thick- 

 ened at the nodes, the branches prostrate or ascending, 

 4 / -i2 / long. Leaves orbicular, broadly ovate or rhom- 

 bic-ovate, obtuse or acute, usually narrowed at the base, 

 entire, inconspicuously veined, rather firm, 2 // -i2 // 

 wide, the petioles shorter than or equalling the blades; 

 flowers y 2 ' f broad or less, mostly clustered in the axils 

 of small upper leaves toward the ends of the branches. 



In dry soil, Kansas to Texas, Arizona and Mexico. 

 June-Sept. 



4. FROELICHIA Moench, Meth. 50. 1794. 



Annual, erect woolly or silky, branching or simple herbs, with opposite sessile entire or 

 slightly undulate narrow leaves, or the lower and basal ones contracted into petioles. Flow- 

 ers perfect, 3-bracted, often bracteolate, in panicled dense spikes. Calyx tubular, nearly 

 terete, 5-cleft or 5-toothed, very woolly, its tube longitudinally crested and sometimes tuber- 

 cled in fruit. Stamens 5, their filaments united into a tube, which is 5-cleft at the summit and 

 bears the i-celled anthers between its lobes. Ovary ovoid; style slender or wanting; stigma 

 capitate or penicillate. Utricle indehiscent, enclosed by the tube of united filaments. [Name 

 in honor of J. A. Froelich, a German botanist.] 



About 12 species, all American. Besides the following, 2 others occur in the Southwestern 

 States. 



Stout, 2-4 tall; crests of fruiting calyx continuous, dentate. 

 Slender, io'-2o' tall; crests of fruiting calyx interrupted. 



1. F. Floridana. 



2. F. gracilis. 



i. Froelichia Floridana (Nutt.) Moq. 

 Florida Froelichia. (Fig. 1412.) 



Oplotheca Floridana Nutt. Gen. 2: 79. i8rS. 

 Froelichia Floridana Moq. in DC. Prodr. 13: Part 2, 420. 

 1849. 



Stem stout, 2-4 tall, the branches slender, erect- 

 ascending, leafless above. Upper leaves linear or lin- 

 ear-oblong, sessile, acute or acuminate at both ends, 

 \'-$ f long, the lower spatulate or oblanceolate, obtuse 

 or acute at the apex, 3 / -6 / long, % f -i r wide, narrowed 

 into margined petioles; spikes mostly opposite, nar- 

 rowly ovoid or oblong, obtuse or subacute, ft'-i' 

 long; fruiting calyx with prominent longitudinal 

 wing-like toothed crests. 



In dry soil, Illinois and Minnesota to Nebraska and 

 Colorado, south to Tennessee, Florida, Kansas and Texas. 

 June-Sept. 



