47 
++ ++ Upper leaves and bracts glandular-ciliate or serrulate: stipular glands usually present. 
4. L. sulcatum Riddell. Annual and glabrous, corymbose above: leaves alter- 
nate, lanceolate, very acute, 3-nerved (lateral veins marginal): sepals lanceolate, 
very acute, keeled and conspicuously glandular-serrulate : styles distinct to or below 
the middle: pod ovoid, rather acu te, about 3mm. long, rather shorter than the calyx, 
its false partitions incomplete.—Dry soil, throughout northern and central Texas, 
5, L. rupestre Engelm. Perennial and somewhat puberulent-roughened: leaves 
more or less opposite below, alternate above, linear-acute, l-nerved, sparingly hairy 
on the margins and midrib below, the upper remote and appressed: sepals ovate, 
very acute or almost bristle- pointed, keeled and glandular-serrulate: styles distinct: 
pod globose-ovoid, about equaling the calyx, its false partitions incomplete.—South- 
western Texaa, 
+ + Pod 4 to 5 mm. long, 5-valved : carpels with triangular cartilaginous insertions at 
base: false partitions complete. 
++ Leaves rather remote on the branches, never imbricated : false partitions more or less 
thickened outwardly. 
6. L. aristatum Engelm. Green or somewhat gray, often puberulent-roughened, 
with slender branches: leaves rather rigid, erect, narrow, tapering to an awn-tipped 
point: sepals rather narrow, lanceolate, broadly scarious and very slender-pointed, 
mostly twice as long as the pod, in which the false partitions are thickened for a 
very small distance at the back.—Valley of the Rio Grande near El Paso, 
7. L. rigidum Pursh. Glaucous, glabrate or slightly puberulent, stouter: leaves 
rather rigid, erect, narrowly lanceolate or linear, mostly mucronate and 1-nerved : 
sepals broader, slender-pointed and more or less awned, strongly 1 to 3-nerved, only 
about a third longer than the pod, in which the false partitions are thickened for 
about one-third their extent.—Apparently throughout the State. 
8. L. Berlandieri Hook. Green: leaves less rigid, broader and more spreading, 
nearly all entire, pointed, more or less 3-ribbed : sepals lanceolate, tapering to a very 
acute awned tip, usually strongly 3-ribbed, about a third longer than the pod, in 
which the false partitions are thickened for about one-half their extent.—In sandy 
ground throughout Texas. 
+ ++ Leaves crowded and overlapping on the slender branches: false partitions entirely 
membranaceous. 
9. L. multicaule Hook. Glaucous, the slender rough-angled stems simple below: 
leaves imbricate-appressed over the entire stem, minnte, narrowly triangular, bristle- 
pointed, more or less scarious-margined, 1-nerved: sepals broadly ovate, almost 
equaled by the globose-ovoid pod.—Throughout Texas. 
MALPIGHIACEA. (MALPIGHIA IAMILY.) 
Trees or shrubs, rarely herbaceous, often climbing, with opposite en- 
tire or barely serrulate leaves, pubescence (when present) appressed 
and fixed by the middle, 5 sepals, 5 petals which are conspicuously 
clawed and pinnately veined, usually 10 monadelphous stamens, 3 dis- 
tinct or united styles, and 3 carpels more or less connate into a 3-celled 
ovary with solitary suspended ovules. 
. * Stamens 10, all perfect: styles 3. 
1. Malpighia. Calyx with 6 to 19 glands: flowers mostly in axillary umbel-like 
clusters: leaves without glands: fruit a stony 3-celled 3-lobed drupe, with carpels 
crested or winged on the back and indehiscent. 
2. Galphimia. Calyx without glands: flowers in terminal racemes: leaves biglan- 
dular on or near the petiole; fruit a 3-lobed capsule, the carpels separating and 
dehiscent, 
