Eastern Mojave Vegetation Coll. No. 2531, Lolium pratense  


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  Poaceae Lolium pratense
Photographed 17 November 2021.

Plants of Jefferson County Open Space
Jefferson County, Colorado

Lolium pratense (Huds.) Darbysh.  Meadow Rye Grass.

[Syn: Festuca pratensis Huds., Schedonorus pratensis (Huds.) P. Beauv.]

Lippincott Ranch, Jefferson County, Colorado. Central "wasp waist" of ranch, just below the ranch road, 22.0 km. north northwest of the GNIS location of Golden. 39.9016N, 105.2738W. WGS 1984 Elev. 1987 M. Weakly rhizomatous. Grassland with a few ponderosa pines. Lippincott Ranch is jointly owned by City of Boulder Open Space and Mountain Parks and Jefferson County Open Space.

Collected by permit: Jefferson County Open Space, 2021, issued: Apr 1, 2021, to: Tom Schweich.

Tom Schweich, with John Vickery 2531. 29-Jun-2021

Coll. No. 2531, 29 June 2021, characters observed: Perennial grass, to 60 cm., weakly rhizomatous; Leaves, sheath and blade differentiated, soft; Sheath, 90 mm., open; Ligule, membraneous, 1 mm., auricles, 1 mm, curled away; Blade, 250 mm. × 3 mm., some flat, some revolute, abaxial glabrous, adaxial scabrous; Inflorescence, 1 per culm, >leaves, panicle, 80 mm. × 9 mm. wide, 2 branches; Rachis, not extended, scabrous on margins; Spikelets, many, 9-10 mm. × 2.5-3.0 mm. wide, similar, borne singly, pedicels, 2.0-7.5 mm.; Compression, unremarkable; Disarticulation, between florets; Glumes, lower, 3 mm., veins, 1, upper, 4.5 mm., <lowest floret, veins, 3, rounded, distally ±keeled, margins, scarious, awns, 0; Florets, 6 per spikelet, 5×♀ + 1 bisexual; Axis, extended; Lemma, 6.5 mm., >glumes, lanceolate, membraneous, rolled, glabrous, green with some purple distally, veins, 3, glabrous, margins, scarious, tip, entire, acute, awns, 0; Palea, 6 mm., ±=lemma, veins, ciliate, green → purple, tip, entire; Anthers, 2, 2.3 mm., cream-colored; Ovary, glabrous; Achene, 3 mm., golden brown.

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Date and time this page was prepared: 9/18/2023 5:25:45 PM