FABACEAE 619 
1. Tium intónsum (Sheldon) Rydb. Plant villous. Stems branched at the base, 
the branches ascending or prostrate, 2-10 cm. long, often branching: leaves 4-10 cm. 
long ; leaflets 9-15, the blades oblong, obovate to suborbicular, 3-10 mm. long, usually 
notched at the apex, slender-stalked : peduncles as long as the subtending leaves or longer : 
racemes suborbicular to ovoid, 1-2 cm. long: calyx densely pubescent ; lobes lanceolate- 
subulate, as long as the tube or longer: corolla dull yellow, about 1 cm. long: pods nar- 
row, about 2 cm. long, villous, slightly curved. [Astragalus villosus Michx. A. intonsus 
Sheldon. ] 
In sandy pine lands, South Carolina to Georgia and Florida. Spring. 
2. Tium obcordàtum (Ell.) Rydb. Plant glabrous or nearly so. Stems branched 
at the base, the branches ascending or prostrate, 1-3 dm. long, sometimes sparingly 
branched : leaves numerous ; leaflets 15-25, the blades obcordate or oblong-obcordate, 3-8 
mm. long, short-stalked : peduncles about as long as the subtending leaves: racemes ovoid 
to cylindric, 1-3 em. long: calyx more or less pubescent ; Jobes narrowly lanceolate, about 
as long as the tube: corolla pale purple or blue, 7-10 mm. long: pods crescent-shaped, 
3-3.5 cm. long, 1-celled, short-beaked, delicately reticulated. [Astragalus obcordatus Ell. ] 
In dry pine lands, Georgia and Florida. Spring. 
3. Tium apilósum (Sheldon) Rydb. Plant silky when young, glabrousinage. Stems 
erect, 3-9 dm. tall, sparingly branched: leaves few, 1-1.5 dm. long; leaflets 15-25, the 
blades linear or nearly so, 1-2 cm. long, mucronulate or notched at the apex, short- 
stalked : peduncles surpassing the subtending leaves : racemes few-flowered, 4-10 cm. long: 
calyx more or less silky : lobes triangular or triangular-lanceolate, shorter than the tube : 
corolla white, 1.5 em. long: pods 3.5-4 cm. long, acute, transversely wrinkled. [Astragalus 
glaber Michx. A. apilosus Sheldon. ] 
In pine lands, North Carolina to Florida. Spring. 
25. PHACA L. 
Perennial or annual herbs, sometimes almost acaulescent. Leaves alternate, the 
stipules nearly free, often partially united : leaflets many, the blades entire. Flowers per- 
fect, in short or elongated racemes, or sometimes nearly sessile in the axils of the leaves. 
Calyx campanulate : lobes more or less unequal, sometimes longer than the tube. Corolla 
mostly ochroleucous, occasionally purple: standard with a relatively broad blade: wings 
longer than the keel-petals. Stamens 10: filaments diadelphous: anthers alike. Ovary 
sessile or stipitate. Ovules numerous. Pod membranous, inflated, neither suture intruded, 
l-celled, without even a partial partition. Seeds numerous. 
Leaflets 7-13: 7 . P. lotiflora. 
Leatets 18-17 "pods mostly over 28 cim Tone. = 2. P. Reverchonit, 
l. Phaca lotiflòra (Hook.) Nutt. Plant silky-villous. Stems wanting or short: 
leaves numerous ; leaflets 7-15, the blades oblong, elliptic or oblanceolate, 5-15 mm. long, 
acute or obtuse, usually short-stalked : peduncles very short or surpassing the leaves in 
length : calyx densely pubescent ; lobes narrowly lanceolate or almost subulate, longer 
than the tube: corolla yellowish, about 1 cm. long: pods 1-celled, less than 2.5 cm. long. 
On prairies, Northwest Territory to Nebraska, Texas and Colorado. Summer. 
2. Phaca Reverchónii (A. Gray) Rydb. Plant silky or silky-pilose. Stems short, 
branching at the base, leafy : leaflets 13-17, the blades narrowly elliptic to oblong, 6-15 
mm. long, acute or obtuse, sessile or nearly so: peduncles 2-10 cm. long, usually about 
as long as the leaves: racemes 1-2 cm. long: calyx densely pubescent ; lobes subulate-lan- 
ceolate, acuminate, usually longer than the tube: coms yellowish, about 1 em. long: 
pods fully 2.5-3.5 cm. long, canescent, acuminate. [Astragalus Reverchonii A. Gray.] 
In dry limestome soil, the Indian Territory and Texas. Spring. 
26. XYLOPHACOS Rydb. 
Perennial mostly copiously pubescent, usually low, herbs, often essentially acaulescent. 
ves alternate, the stipules nearly free, distinct : blades entire. Flowers perfect, in 
Tt, often almost capitate, racemes. Calyx cylindric: lobes shorter than the tube. 
Corolla purple, or very rarely ochroleucous or crimson: standard with a narrow blade. 
only slightly longer than the wings. Stamens 10: filaments diadelphous: anthers alike, 
vary sessile. Ovules many. Pod fusiform to ovoid, leathery or woody, pubescent, 1- 
celled, without a partition, but the lower suture sometimes slightly sulcate. Seeds 
humerous. 
Lea 
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