6 NORTH AMERICAN FLORA [VOLUME 33 
leafy spikes; involucre turbinate, 2-3 mm. wide; bracts 3, more or less united into a cup, his- 
pidulous-strigose without, with scarious villous-ciliate margins; chaffs filiform; staminate 
flowers 3—5; corollas elongate, funnelform; anthers with acuminate tips; style half as long as 
the stamens; stigma minute; pistillate flowers usually solitary; corolla-tube as long as the ovary; 
achenes obovate, glandular-muriculate and somewhat pilose at the apex. 
TYPE LOCALITY: Near Veracruz. ; 
DISTRIBUTION: Sand dunes, states of Veracruz and Tamaulipas; reported from Pensacola, 
Florida. 
6. Iva oraria Bartlett, Rhodora 8: 26. 1906. 
Iva frutescens Bigel. Fl. Bost. 204. 1814. Not I. frutescens L. 1753. 
A frutescent perennial, growing in clumps; stems 0.5—1 m. high, branched above, angled, 
striate, somewhat strigose-hispidulous; leaves mostly opposite, short-petioled; blades ovate 
or broadly lanceolate, or some on the branches narrower, coarsely serrate, acute or obtuse, 
thick, strigose-hispidulous, triple-ribbed, 5-12 cm. long, 2-5 cm. wide; those of the inflorescence 
linear-lanceolate and often entire; heads numerous in leafy panicles; involucre hemispheric, 
5-6 mm. broad, strigose; bracts 5 or 6, rounded-obovate, erose on the margin; paleae from 
cuneate-spatulate to linear-oblanceolate; staminate flowers up to 20; corollas funelform: an- 
thers with acute tips; style shorter than the stamens; stigma capitate, penicillate; pistillate 
flowers 5 or 6; achenes lenticular, obovate, glandular-muricate, fully 3 mm. long. 
TYPE LOCALITY: Banks of Charles River, Boston, Massachusetts. 
DISTRIBUTION: Banks of tidal streams and salt marshes, along the coast, from Massachusetts 
to Virginia. 
ILLUSTRATION S: Lam. Tab. Encyc. #1. 766, f. 2; Britt. & Brown, Ill. Fl. f. 3586; ed. 2. f. 
4120 (as I. frutescens). 
7. Iva frutescens 1. Sp. Pl. 989° Viva 
A shrubby perennial; stem branched, 1-3.5 m. high, strigose-hispidulous, somewhat 
angled, striate; leaves mostly opposite, short-petioled; blades of the main stem lanceolate to 
narrowly lanceolate, dentate, 4-10 cm. long, thick, triple-ribbed, strigose and glandular-punc- 
tate; those of the branches linear-lanceolate and denticulate, those of the inflorescence linear; 
heads numerous, in leafy panicles; involucre hemispheric, 4-5 mm. broad; bracts 4 or 5, obovate 
or oval, rounded and somewhat erose at the apex, strigulose; paleae narrowly spatulate or those 
subtending the pistillate flowers broadly so or elliptic; staminate flowers up to 20; corolla fun- 
nelform; anthers with acute tips; style much shorter than the stamens; stigma capitate, peni- 
cillate; pistillate flowers 4 or 5; achenes lenticular, obovate, 2-2.5 mm. long, glandular-muri- 
cate. 
TYPE LOCALITY: Virginia. 
DISTRIBUTION: Virginia to Florida and Texas. 
8. Iva Hayesiana A. Gray, Proc. Am. Acad.11: 78. 1876. 
A fruticose perennial; stem about 1 m. high, with simple branches, puberulent and hispid- 
ulous; leaves of the stem mostly opposite, short-petioled, 3-6 cm. long, thick, oblanceolate to 
oblong-spatulate, obtuse, entire, hirsutulous and glandular-punctate; those of the inflorescence 
alternate, linear-cblong, rather short; heads numerous in leafy racemes; involucre hemispheric, 
5—6 mm. broad; bracts 5 or 6, distinct, somewhat imbricate, rounded-ohovate; paleae spatulate; 
staminate flowers up to 20; corolla trumpet-shaped; anthers with acute tips; pistillate flowers 
about 5; achenes Jenticular, obovate, about 2 mm. long, glandular-muricate. 
TYPE LOCALITY: San Diego County, California. 
DISTRIBUTION: Southern California, Lower California, and adjacent islands. 
9. Iva cheiranthifolia H. B. K. Nov. Gen. & Sp. 4: 276. 1820. 
A fruticose perennial; stems 1-2 m. high, much-branched, angled, striate, hirsute-puberu- 
lent; leaves of the stem and branches opposite, short-petioled, oblanceolate to linear-lanceolate, 
triple-ribbed, thick, entire, obtuse or acute, hirsutulous-pubescent and glandular-punctate, 
4~—8 cm. long; those of the inflorescence alternate, linear or linear-lanceolate; heads very numer- 
