CHROMOSOME NUMBERS AND TAXONOMIC NOTES ON NORTHERN GRASSES: IV. TRIBE FESTUCEAE: POA, AND PUCCINELLIA

Abstract

Chromosome numbers and voucher specimens are recorded for some Canadian and Alaskan collections and a few mainland American collections of Poa and Puccinellia which belong to the tribe FESTUCEAE. The somatic chromosome numbers of the following are recorded: (1) Poa agassizensis, 2n = ca. 56; P. alpina, 2n = 32, 33, 39, and 42; P. ampla, 2n = 62; P. annua, 2n = 28; P. arctica, 2n = 56, 63, 70, ca. 75, 78, 82, 85, 86, and 106; P. arida, 2n = ca. 76; P. canbyi, 2n = 56, 70, and ca. 98; P. cusickii, 2n = 56, and 59; P. eminens, 2n = 42; P. fernaldiana, 2n = ca. 42; P. glauca, 2n = 42, 50, 56, 64, 65, 70, 75, and 78; P. glaucantha, 2n = 44; P. glaucifolia, 2n = 56, ca. 70, and ca. 100; P. interior, 2n = 28, 34, 42, and 56; P. juncifolia, 2n = ca. 60; P. leptocoma, 2n = 42; P. nervosa, 2n = 56, and ca. 74; P. palustris, 2n = 28, 30, and 32; P. pratensis, 2n = 28, 42, 44, 56, ca. 66, 67, 70, 74, ca. 78, ca. 82, 84, 86, 88, and ca. 124; P. saltuensis, 2n = 28; P. secunda, 2n = 42, 56, 70, ca. 78, 80. and ca. 90; P. stenantha, 2n = 42; and P. trivialis, 2n = 14.(2) Puccinellia ambigua, 2n = 56; P. americana, 2n = ca. 42 and 56; P. angustata, 2n = 42; P. borealis, 2n = 42; P. bruggemannii, 2n = 28; P. cusickii, 2n = 28; P. distans, 2n = 42; P. glabra, 2n = 42 and 56; P. hauptiana, 2n = 28; P. laurentiana, 2n = 42 and 56; P.longiglumis, 2n = 56; P. lucida, 2n = 42 and 56; P. nuttalliana, 2n = 42; P. × phryganodes, 2n = 21; P. vaginata, 2n = 56; and P. vahliana, 2n = 14.