Part 2, 1917] AMARANTHACEAE 127 
the lobes lance-ovate, acutish, glabrous, scarious, white; utricle glabrous; seed compressed- 
ovoid, 0.6 mm. long, brown, shining. 
TyPé Locality: Tropical America. 
DISTRIBUTION: In dry, stony soil, western Texas to southern Arizona, and southward to south- 
ern Mexico; also from Brazil to Argentina and Bolivia. 
ILLustTRATION: H. B. K. Nov. Gen. & Sp. pl. 518. 
V. FROELICHIEAE. Annual or perennial herbs. Leaves opposite. 
Flowers perfect; segments of the perianth united to the middle or higher to 
formatube. Stamens hypogynous, the filaments united to form a tube; anthers 
2-celled. Ovary 1-ovuled, the ovule pendulous. Radicle superior. 
A single genus. 11. FRoELICHIA. 
11. FROELICHIA Moench, Meth. 50. 1794. 
Oplotheca Nutt. Gen. 2: 78. 1818. 
Hoplotheca Nutt.; Spreng. Syst. 4: Cur. Post. 52. 1827. 
Ninanga Raf. Fl. Tell. 3: 76. 1837. 
Everion Raf. Sylva Tell. 124. 1838. 
Annual or perennial, erect or procumbent, pubescent herbs with simple or branched 
stems. Leaves opposite, sessile or petiolate, the blades entire. Flowers perfect, sessile, 
spicate, bracteate and bibracteolate, the spikes sessile or pedunculate; perianth 5-lobed, the 
lobes glabrous, the tube lanate, indurate in age and longitudinally winged or cristate, or 
bearing longitudinal rows of spines. Stamens 5; filaments united to form an elongate tube, 
this 5-lobed at the apex, the lobes short or elongate, obtuse; anthers 2-celled, sessile in the 
sinuses between the lobes. Ovary ovoid; style elongate and with a capitate stigma, or the 
stigma penicillate and sessile; ovule 1, suspended from the apex of an elongate funicle. Utricle 
ovoid, membranaceous, indehiscent, included in the calyx-tube. Seed inverted, lenticular 
or obovoid, smooth; embryo annular, with farinaceous endosperm; radicle superior. 
Type species, Froelichia lanata Moench. 
Calyx-tube, at maturity, with lateral rows of distinct spines; plants slender, 
much branched. 
Stems densely white-lanate; faces of the calyx-tube tuberculate. 1. F. gracilis. 
Stems pubescent with short, mostly appressed, brownish hairs; faces of the 
ealyx-tube each with 1 or more sharp spines. 2. F. Braunii. 
Calyx-tube, at maturity, with lateral, deeply dentate to entire crests; plants 
stout, sparsely branched. 
Calyx-crests deeply dentate. . . 
Pubescence on the upper part of the stem of very short, brownish hairs; 
one or both faces of the calyx-tube with 1 or 2 tuberculate or spinose 
idges. 3. F. floridana, 
Pubescence of the stems white-lanate; one or both faces of the calyx- 
tube with a basal spine. 
Perennial, from a thickened woody root; stems branched at the base. 4. F. arizonica. 
Annual, from a slender taproot; stems usually simple at the base. 5. F. campestris. 
Calyx-crests merely erose or crenulate, or entire. : 
Annual; leaf-blades narrowly oblong or lanceolate, their pubescence 
fulvous; sides of the calyx-tube with 1 or 2 crests. . 6. F. Drummondii. 
Perennial; leaf-blades, at least the upper ones, ovate-orbicular or oval, : 
their pubescence white or gray; sides of the calyx-tube naked. 7. F. interrupta. 
1. Froelichia gracilis (Hook.) Moq. in DC. Prodr. 137: 420. 1849. 
Oplotheca gracilis Hook. Ic. under pl. 256. 1840. ; 
Froelichia floridana Uline & Bray, Bot. Gaz. 20: 338, in part. 1895. 
Slender, erect or ascending, sometimes procumbent annual, much branched at the base; 
stems simple or branched, 2-6 dm. long, densely or sparsely villous-tomentose, sometimes 
viscid above; leaves short-petiolate, the blades linear to lanceolate or lance-elliptic, 3-12 cm. 
long, 2-7 mm. wide, acute to long-acuminate at the apex, acuminate or attenuate at the base, 
canescent or sericeous on the upper surface, sericeous or tomentose beneath with white or 
gray hairs; spikes slender or stout, 1-3 cm. long; bracts acuminate, fuscous or stramineous; 
bractlets stramineous or fuscous; calyx-lobes oblong-linear, acute or acutish; calyx-tube with 
2 lateral rows of distinct spines at maturity, the sides of the tube tuberculate near the base; 
seed 1.5 mm. long, yellowish-brown, shining. 
TYP) CALITY: Texas. ; 
Seliaeatemne In dry soil, Iowa to Colorado, and southward to Arkansas, Arizona, and Chi- 
huahua. 
ILLUSTRATIONS: Britt. & Brown, Ill. Fl. f. 1413; ed. 2. f. 1675. 
