Reports of explorations and surveys, to ascertain the most practicable and economical route for a railroad from the Mississippi River to the Pacific Ocean: Vol. 6, Pt. 3

BOTANY.
PENTSTEMON MIENZIESII, Benth.; P1. Hartw., _p. 327. On rocks, Cascade mountains, O. T.
PENTSTEMON PROCErUS, Dougl.; Hook. Flor. Bor. Am. 2, p. 96. McCumber's, N. Cal., and
Klamath basin.
PENTSTEMON IETEROPHYLLUS, Lind. Bot. Beg. t. 1899. Sides of Lassen's butte, N. Cal., July.
PENTSTEMON GLAUCIFOLIUS (sp. nov.): glaberrimus, glaucus; caule confertim folioso basi
ramoso (1-2 pedali;) foliis crassiusculis integerrimis acutatissimis lanceolatis ol)longisve in
petiolem brevem attenuatis, cwteris semi-aml)lexicaulibus plerumque cordato-ovatis vel e basi
sub-cordata ovato-lanceolatis; panicula virgata multiflcra; pedunculis folia floralia superan tibus folioso-bibracteatis 1-3-floris; calycis segmentis ovatis subacuminatis; corolla azurea
sesquipolicari sursum ampliata; filamento sterili apice dilatato hirtello.
Fort Reading, on the Sacramento river, California. Cauline leaves 1-11 inches long, about
g inch wide at the clasping base, tapering to the acute apex; the floral similar, gradually
decreasing in size; bractlets also foliaceous. Anthers hispid-ciliate, also hirsute at the insertion. Calyx nearly as in the broader-sepalled form of P. heterophyllus. A most elegant and
showy species, which I should have referred to Bentham's P. azureus from his character, except
that the sterile filament is not glabrous, and in my specimen of Hartweg's, No. 1879, the leaves
are all rather narrowly lanceolate: indeed I cannot distinguish that plant from P. heterophylu8.
It is possible that Mr. Bentham had the two plants, and drew the characters of the foliage from
our present plant, and of the sterile filament from the allied P. h7eterophyllus. If the sparing
beard of the sterile filament cannot be relied upon, and the two run together, then the variable
species well deserves the name of heterop7hyllus.
PENTSTEMON GRACILENTUS (sp. nov.): glaber; caule tenero subpedali adscendente; fols
integerrimnis inferioribus oblongo-lanceolatis in petiolum longiusculum attenuatis, superioribus
paucis augusto-linearibus sessilibus, floralibus lineari-setaceis; panicla laxa subsimplici; cymis
pedunculatis 3-5-floris; calycibus pedicellisque eequelongis pubero-glandulosis, segmentis
oblongo-lanceolatis breviter acuminatis; corolla tubuloso-infundibuliformi subbilabiata ccerulea
staminibusque glaberrimis; filamento sterili filiformi superne obsoletissimii barbato.
At the base of Lassen's butte, N. California. Lower leaves about two inches long, and
with a petiole about one inch long; the upper few, and gradually reduced to slender bracts
corolla slender, half an inch long; anthers intermediate in structure between those of the
sections Eupentstemnon and Saccanthera, glabrous, except a minute denticulate ciliation at the
line of dehiscence.
PENTSTEMON NEWBERRYI (sp. nov.): fruticosus, glaber, coespitoso-procumbens; foliis ovali
bus seu ovato-oblongis sub-coriaceis crebre serrulatis, caulinis obtusis basi in petiolum contractis
summis sessilibus acutis; racemo 7-11-floro; calycis segmentis lanceolatis sensim acuminatis
pedicellum ~quantibus; corolla punicea tubulosa belabiata, labio, inferiore patente trifido intus
linleis 2 barbato; stamninibus sub-exsertis; antheris (praesertimn ad margines) lanatis; filamento
sterili brevi filiformi longitudinaliter parce barbato. (Plate XIV. ) On rocks, forming broad
tufts near Mount St. Joseph's, N. California. A well marked species of the section Elmigera,
but with woolly anthers. Leaves turning blackish in drying. Corolla deep crimson, very
handsome, 1: inches long.
Plate XIV. PENTSTEMON NEWBERRYI. A flowering stem of the natural size. Fig. 1.
Corolla laid open, with the stamens. 2. A separate stamen. 3. Pistil and calyx, the ovary
vertically divided. The analyses enlarged.
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