E-Flora BC: Electronic Atlas of the Flora of British Columbia

Bromus diandrus Roth(Roth) Lainz
rip-gut brome
Poaceae (Grass family)

Introduction to Vascular Plants
Once images have been obtained, photographs of this species will be displayed in this window.Click on the image to enter our photo gallery.
Currently no image is available for this taxon.
E-Flora BC Static Map
Distribution of Bromus diandrus
Click here to view the full interactive map and legend
Details about map content are available here
Click on the map dots to view record details.

Bromus diandrus ssp. rigidus

Species Information

Click on the image below to view an expanded illustration for this species.

Annual grass from fibrous roots; stems usually smooth or hairy only above, 40-80 (100) cm tall.
Sheaths usually spreading soft-hairy or the hairs angled downwards; blades 3-10 (12) mm wide, flat, soft-hairy on both surfaces; ear-shaped lobes lacking at the leaf-bases; ligules somewhat jagged, (2) 3-5 (6) mm long.
Inflorescence a panicle, 10-15 cm long, the branches elongate, nearly erect to spreading, bearing mostly 1 or 2 spikelets; spikelets 5- to 7- (8-) flowered, widest above the midlength, 2.5-4 cm long; florets closed, self-fertilizing; glumes narrowly lanceolate, smooth, the lower ones 1- (rarely 3-) nerved, 13-20 (22) mm long, the upper ones 3-nerved, 25-33 mm long; lemmas rough to short-hairy, 22-30 mm long, long-pointed, bidentate, the teeth slender, 3-4 mm long, awned, the awns straight, 35-60 mm long; anthers (2) 3, mostly included, 1-1.5 mm long, but sometimes exserted and 3-3.5 mm long.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Dry roadsides and waste places in the lowland zone; infrequent on S Vancouver Island and the Gulf Islands, rare in the Vancouver area; introduced from Europe.

Source: The Illustrated Flora of British Columbia

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References