400 CORRIGIOLACEAE 
acute, deciduous: calyx shorter than the bracts: sepals cuneate, 2 mm. long (with the 
cusps), hooded above, the awn-like cusp nearly as long as the body of the sepal, ascending 
or diverging. 
In dry soil, Texas. 
4. Paronychia Lindheimeri Engelm. Annual or biennial, slender, glabrous. Stem 
branched at the base, the branches erect or ascending, wiry, 0.5-2 dm. tall, forking above or 
throughout : leaf-blades nearly filiform, 0.5-1.5 cm. long, acute, sessile; stipules narrowly 
lanceolate: cymes open: sepals oblong, 1.7-2 mm. long, slightly hooded, scabrous at the 
base, minutely cuspidate, the cusp more or less spreading. 
In dry soil, Texas and New Mexico. 
5. Paronychia scoparia Small. Perennial, rather slender, minutely pubescent. 
Stem much branched at the base, the branches tufted, erect or ascending, 2-3 dm. tall, 
simple below, sparingly forked above, roughish : leaf-blades linear-filiform, 1-3 cm. long, 
acute, grooved on either side of the midrib, serrulate-ciliate, especially near the apex, ses- 
sile ; stipules linear-lanceolate, 1-1.5 cm. long, attenuate: branches of the cymes erect or 
strongly ascending: sepals linear-lanceolate, gradually narrowed to the apex, 3-3.5 mm. 
long, firm, keeled, usually with a short lateral nerve on each side of the keel, hooded, each 
prolonged into a stout ascending cusp, which is 4 to 1 as long as the body : stamens half as 
long as the sepals. 
In dry soil, Indian Territory and Texas. 
6. Paronychia dichótoma (L.) Nutt. Perennial, slender, the foliage glabrate or 
nearlyso. Stem branched at the base, the branches erect or ascending, tufted, 1-4 dm. tall, 
rigid, wire-like, forking above: leaf-blades linear-filiform, 1-4 cm. long, acute, smooth ; 
stipules linear-lanceolate, 8-13 mm. long, long-attenuate, silvery: cymes open, many- 
flowered : sepals lanceolate, about 3 mm. long, slightly hooded, the back produced into a 
short terminal cusp : stamens fully 3 as long as the sepals. 
In rocky soil, Maryland to North Carolina, Arkansas and Texas. NAILWORT. 
7. Paronychia Jamésii T. & G. Perennial, minutely pubescent. Stem usually 
much branched at the base, the branches tufted, erect or ascending, 0.5-2 dm. tall, forking 
above: leaf-blades linear-filiform, 0.5-2 cm. long, acute, sessile; stipules silvery, linear- 
lanceolate: cymes slightly open: calyx about 2.5 mm. long: sepals lanceolate, gradually 
acuminate, hooded, each terminating in a short more or less spreading cusp : utricle ovoid, 
less than 1 mm. in diameter. 
In dry soil, Nebraska and Colorado to Texas, Arizona and Mexico. 
8. Paronychia Wárdi Rydb.  Perennial, puberulent or minutely pubescent. Stem 
much branched at the base, the branches quite slender: leaf-blades narrowly linear to 
linear-filiform, 0.7-2 cm. long, acute, early deciduous or fugacious: cymes widely open, 
the branches diverging: calyx about 2 mm. long: sepals oblong, abruptly acuminate : 
utricle somewhat smaller than that of the next preceding species. 
In dry or stony soil, Kansas and Colorado to Texas and New Mexico. 
9. Paronychia argyrocdma (Michx.) Nutt. Perennial, finely pubescent, conspicuous 
on account of the numerous silvery stipules. Stem branched at the base, the branches ascend- 
ing or decumbent, tufted, 0.5-3 dm. long, simple or sparingly forked, the hairs recurved : 
leaf-blades linear or nearly so, 1-3 em. long, acute, ciliolate, rather fleshy ; stipules lanceo- 
late, 5-10 mm. long, acuminate: flowers in congested cymes: sepals narrowly lanceolate, 
4-5 mm. long, firm, long-attenuate, ciliate, the tips and edges hyaline: stamens about } as 
long as the sepals: anthers dark green: utricle nearly oblong, about 1.5 mm. long. 
On cliffs, Maine and New Hampshire to Georgia and Tennessee. 
2. ANYCHIASTRUM Small. 
Annual or perennial mostly Anychia-like herbs, with finely pubescent or glabrous foli- < 
age. Stems branched at the base, the branches diffusely spreading or prostrate. Leaves op- 
posite : blades narrow or as broad as long. Flowers in dichotomous cymes, inconspicuous. 
Bracts similar to the leaves. Calyx manifestly pedicelled. Sepals distinct or nearly so, 
merely cuspidate, erect. Stamens mostly 5, inserted at the base of ovary. Styles relatively 
long, united to near the top. Utricle included. The plants flower during the summer 
and fall. 
Annual or biennial: calyx pubescent. ere 
Calyx becoming 2 mm. long: sepals bristly pubescent. 1. A. herniarioides. 
Calyx becoming 1 mm. long: sepals inconspicuously pubescent. 2. A. Baldwinn. 
Perennial: calyx glabrous. 3. A. riparium. 
