GENUs I. : PLANTAIN FAMILY. 
11. Plantago pusilla Nutt. Slender Plantain. 
Fig. 3908. 
Plantago pusilla Nutt. Gen. 1: 100. 1818. 
Annual, puberulent; scapes filiform, 2’-7’ high, 
longer than the linear-filiform, mostly entire, blunt- 
pointed obscurely 1-nerved leaves. Leaves about 3” 
wide; spikes slender, linear, rather loosely flowered, 
2’-3' long, 14-2” thick; flowers imperfectly dioecious 
or polygamous; sepals oblong, obtuse, about as long 
as the bract, scarious-margined; corolla-lobes of the 
more fertile plants becoming erect over the pyxis; 
stamens 2; pyxis ovoid-oblong, obtuse, one-fourth to 
one-third longer than the calyx, about 4-seeded, cir- 
cumscissile at about the middle; seeds nearly flat on 
both sides. 
In dry sandy soil, Massachusetts to Georgia, Illinois, 
Kansas and Texas. April—Aug. 
Plantago elongata Pursh, to which this was referred in our first edition, differs by larger 
seeds and saccate bracts, and enters our western limits in Nebraska. 
12. Plantago heterophylla Nutt. Many- 
seeded Plantain. Fig. 3900. 
Plantago heterophylla Nutt. Trans. Am. Phil. Soc. (II.) 
5: 177. 1833-37. 
Annual, similar to the preceding species, but gla- 
brous or slightly puberulent; scapes ascending or 
spreading, equalling or exceeding the leaves, 2’-10’ 
long. Leaves narrowly linear or filiform, the larger 
about 2” wide, entire or often with several distant 
small teeth or linear lobes; spikes loose, linear, 3’-5’ 
long; sepals oblong, obtuse, scarious-margined, mostly 
shorter than the bract; corolla-lobes in the more fer- 
tile plants becoming erect over the pyxis; stamens 2; 
pyxis oblong, subacute, about twice as long as the 
calyx, 7-30-seeded, circumscissile rather below the 
middle; seeds somewhat angled, scarcely concave on 
the face. 
In moist soil, New Jersey to Florida, Illinois, Arkan- 
sas, Texas and apparently introduced in California. 
April-July. 
13. Plantago arenaria W.& K Sand Plantain. 
Fig. 3910. 
Plantago arenaria W. & K. Pl. Rar. Hung. 1: 51. pl. SI. 
1802, 
Annual, pubescent, somewhat viscid; stem simple, or 
commonly becoming much branched, leafy, 3’-15’ high. 
Leaves opposite, or whorled, narrowly linear, entire, 
sessile, 1’-3’ long, about 1” wide; peduncles axillary, 
often umbellate at the ends of the stem and branches, 
slender, as long as the leaves or longer; heads of flowers 
conic, oval, or subglobose, 5-10” long, about 5” thick; 
lower bracts acute or acuminate; calyx-lobes unequal ; 
corolla-lobes ovate to lanceolate, acute; capsule 2-seeded. 
Fields, Dayton, Ohio, and Lancaster County, Pennsylva- 
nia. Adventive from central Europe. Summer. 
