944 Engelmann and Gray, 
ceolato-oblongis vel ovato-lanceolatis utrinque acutis grosse 
serratis (serraturis plerumque patentibus mucronulatis eglan- 
dulosis) supra puberulis subtus cum petiolis brevibus eglandu- 
losis tomentoso-pubescentibus; stipulis setaceis glanduliferis 
petiolum squantibus; umbellulis 2-3-floris; pedicellis calyci- 
- busque (laciniis ovatis obtusiusculis) pubescentibus; petalis 
orbiculatis; ovario glabro. — P. Chicasa 8? normalis, Torr. § 
Gr. Fl. I. p. 467. Open post-oak woods west of the Brazos, 
where it is called Post-Oak Plum. A low shrub, with leaves 
only one to two inches long. Doubtless a distinct Species, 
which should stand between P. Chicasa and P. glandulosa. 
938. CExorurna sERRULATA, 0. SPINULOSA; Torr. & Gr. An 
unusually large-flowered form ; the petals an inch in length. 
Sandy, dry, or moist prairies. May — June. 3 
239. GAURA LONGIFLORA (Spach): elata, pilis brevibus 
"undique canescenti-puberula ; caule erecto paniculato-ramo- 
sissimo ; foliis lanceolatis lineari-lanceolatisve utrinque angusta- 
tis mucronato-acuminatis, sparsim repando-denticulatis, rameis 
multo minoribus linearibus integerrimis; spicis ramosis laxi- 
floris; bracteis linearibus deciduis; calycis segmentis tubum 
plerumque superantibus ; petalis spathulatis longe unguicu 
calyce et staminibus brevioribus ; nuce sessili ovata canescente 
4-carinata nervis 4 intermediis leviter notata. — G. exaltata, 
Engel. MSS. G. biennis, 8. Pitcheri, Torr. & Gr. Ft. I 
p. 517. — Prairies at the margin of woods between the Brazos 
and the Colorado, &c., where it often exclusively covers large 
spaces of ground ; flowering in August and September. Plant 
taller and much more branching than G- biennis (6 —9 feet 
high) with narrower leaves, smaller flowers (the pe ad 
ing from white to reddish,) and much smaller and, when npe; 
rounder fruit. The G. filipes, 4. major, Torr. & Gr. I, c, 18 
confused with this species. Spach described from an imper- 
fect specimen collected in Louisiana, by Drummond. - 
specific name has no particular applicability. 
. 940. G. Daummonnu, Torr. & Gr. lc: Dry banks and 
‘road sides. Canescently pubescent; the leaves often sinuale" 
