It has been suggested that Bromus aleutensis may be a modified version of the similar Bromus sitchensis in which reproduction occurs at an earlier developmental state as a response to the climate of the Aleutian Islands. In addition, while B. aleutensis is mostly self-fertilizing and B. sitchensis is mostly outcrossing, anther lengths close to Шаблон:Convert in some individuals of B. aleutensis suggests outcrossing.[1]
Description
B aleutensis is a perennial grass that is loosely cespitose. The decumbent culms are Шаблон:Convert tall and Шаблон:Convert thick. The striate and pilose leaf sheaths have dense hairs. Auricles are rarely present. The glabrous ligules are Шаблон:Convert long. The somewhat pilose leaf blades are Шаблон:Convert long and Шаблон:Convert wide. The open panicles are Шаблон:Convert long. Lower branches of the inflorescence are Шаблон:Convert long and number one to two per node, with two to three spikelets on their distal half. The elliptic to lanceolate spikelets are Шаблон:Convert long, with three to six florets. The glumes are glabrous or pubescent, with the three- to five-veined lower glumes being Шаблон:Convert and the seven- to nine-veined upper glumes being Шаблон:Convert. The lanceolate lemmas are Шаблон:Convert and are laterally compressed and softly pubescent. The lemmas have nine to eleven veins, with the veins being especially conspicuous distally. The awns are Шаблон:Convert and the anthers are Шаблон:Convert.[1]
Habitat and distribution
Bromus aleutensis grows in sand, gravel, and disturbed soil in the Pacific coast, particularly from the Aleutian Islands (as its specific epithet indicates) to western Washington, though it has been found farther east in lake shores or road edges of Canada and Idaho.[1][2]
Ecology
Bromus aleutensis is infected by Fusarium nivale and Hendersonia culmicola.[3]
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