Robert F. Hoover Herbarium, Cal Poly State University
Catalog #: OBI124863
Occurrence ID (GUID): cc299b5b-0fca-4b28-ab3e-520c7c1adb27
Taxon: Achnatherum lettermanii (Vasey) Barkworth
Family: Poaceae
Taxon Remarks: Lettermans Needlegrass
Collector: Tom Schweich   1998   
Date: 2018-07-24
Verbatim Date: 24-Jul-18
Locality: United States, Colorado, Lake, Brumley; On a terrace beside the North Fork of Lake Creek, between Twin Lakes and Independence Pass, about 11 mi. generally west on Colorado Highway 82 from the town of Twin Lakes.
39.08949042  -106.5418332  WGS 1984
Elevation: 3214 meters (10542ft)
Description: perennial, to 7- cm., clumped; leaves, sheath 80 mm, open, glabrous, ligule membranous, 1 mm, auricles absent, blade 150 mm x 1.7 mm wide, revolute, sparsely scabrous; inflorescence 1 per culm, > leaves, panicle 100 mm x 12 mm wide, spikelets many; axis not extended, glabrous; spikelets many, 6 mm x 1 mm wide excluding awn, similar, borne singly, pedicels 1.2-6.0 mm, 1-flowered; compression unremarkable; disarticulation above the glumes; glumes subequal, lower 7 mm x 1 mm wide, veins #1 upper 6.5 mm x 1.3 mm wide = lowest floret, veins #3 rounded, membranous, tip extended sharp soft point, not really an awn; florets 1 per spikelet, bisexual; callus 0.5 mm, pointed but not sharp like other cogeners, short, straight, white hairs; lemma 4 mm [less than or equal to] glumes, ovate, color tan, stiff but not hard, hairs slightly longer and more dense distally than proximally, straight, longest 1.2 mm, color white, veins #3, parallele, then converging at awn, tip 2-forked, awns #1 17 mm, attached at end of lemma, scabrous, bent twice, twisted, terminal segment straight; palea 3.5 mm, < lemma, 87% length of lemma, membranous, hairy, hairs extending beyond tip, tip entire, color tan; anthers, 1.4 mm; achene 3 mm, green
Notes: Plants of Colorado. Brumley was a stage stop on the route across Independence Pass.
Specimen Images
Link to Source: 2207128
Record ID: 8ab5d74b-9ad2-4da4-98fa-ed30e3517fc7
For additional information on this specimen, please contact: Jenn Yost, Director and Assistant Professor o (
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