ol 
2. ERODIUM L’Her. (STORKSBILL.) 
Like the last, but with only 5 Stamens, the carpel-tails long-bearded 
on the inner side and becoming spirally twisted, the terminal or lateral 
peduncles umbellately 2 to several. flowered with a 4-bracted involucre 
at the base of the pedicels, and flowers small. 
* Leaves cordate and lobed. 
1. BE. macrophyllum Hook. & Arn. Pubescence with more or less of spreading 
glandular hairs: leaves reniform-cordate, 2.5 to 7.5 em. broad ; Stipules small: pedun- 
cles elongated: sepals broad, 10 to 12 mm. long: carpels oblong, with the stout beak 
3.5 cm. long.—‘ Texas to California,” fide Trelease. 
2. E. Texanum Gray. Pubescence appressed, not glandular: leaves ovate-cor- 
date, smaller and more deeply lobed, usually about 2.5 em, long: peduncles shorter: 
sepals narrower, 6 to 10 mm. long: carpels narrow, with the slender beak 3.5 to 7.5 
em. long.—Throughout southern and western Texas, 
** Leaves pinnate or pinnatifid, the divisions lobed or toothed. 
3. E. cicutarium L’Her. Hairy, much-branched from the base: leaves pinnate, 
the leaflets laciniately pinnatifid with narrow acute lobes: peduncles exceeding the 
leaves, bearing a 4 to 8-flowered umbel: sepals 2 to 6 mm. long, acute: petals bright 
rose-color, a little longer: tails of the carpels 2.5 to5 em. long: pedicels slender, at 
length reflexed, the fruit still erect.—Introduced from Europe into the Western 
States, and reported as occurring in southern and western Texas. Known by vari- 
ous popular names, as “alfilaria,” “pin-clover,” “ pin-grass,” and valuable as a 
forage plant, 
3. OXALIS L. (Wo0oD-SORREL,) 
Low, often acaulescent herbs with a sour juice, alternate 1 to 3-folio- 
late leaves, few to many-flowered peduncles, 10 stamens, and a 5-celled 
columnar or ovoid loculicidal pod, with 2 to several seeds in each cell,— 
Several species produce small peculiar flowers precociously fertilized 
in bud and particularly fruitful. The ordinary flowers are often dimor- 
phous or trimorphous in the relative length of stamens and Styles. 
*Caulescent: flowers yellow (sometimes tinged with red-purple), 
+ Leaves unifoliate, with free setaceous stipules, 
1. O. dichondrefolia Gray. Perennial, appressed-pubescent, with spreading or 
procumbent branches: the single leaflet round-ovate, Wavy-margined, cordate, 
abruptly depressed and mucronate at apex, 12 to 30 mm. long, petiole as long: flow- 
ers 12 mm. long, solitary on axillary peduncles equaling or surpassing the leaves, 
and with 2 setaceous bracts near the summit: sepals triangular-lanceolate, acute, 
dilated at base: petals half as long again as the calyx: pod round-ovoid, 10 mm. 
long, pubescent: seeds with prominent tubercles in transverse or oblique rows,— 
Common throughout southern and western Texas. 
+ + Leaves pinnately 3-foliate, without stipules. 
2. O. Berlandieri Torr. Perennial, much branched, gtay- or rusty-pubescent: 
leaves on petioles about 15 mm. long, terminal leaflet obovate-oblong, 10 to 15 mm. 
long, on a stalk half as long, lateral ones smaller, opposite, oblong, very short-stalked, 
all obliquely emarginate at apex and nearly glabrous above: flowers about 12 mm, 
long, umbellate at the ends of axillary peduncles about equaling the leaves: sepals 
lanceolate, acute, the petals thrice as long: pod ovoid, about 5mm. long, pubescent : 
seeds fusiform, somewhat flattened, with 8 prominent longitudinal zigzag wings or 
rows of teeth.—Southeastern Texas, from the Nueces to the Rio Grande, 
