. Report of the Canadian Arctic Expedition 1913-18. Scientific expeditions. Arctic Plants: Morphology and Synonymy 11 B To consider the species as a mere variety of G. maritima, as has been done in recent years, is open to question, and Johanson ^ has written a very instructive paper, demonstrating that G. vilfoidea and G. maritima are not conspecific. Lange gives a good diagnosis of G. vilfoidea (Conspectuslc. p. 170) as follows: "Gracilis, glaberrima, rhizomate obliquo, foliorum fasciculos-abbreviatos et flagella yalde elongata gracilia emittente; foliis anguste linearibus subcompli- ca
. Report of the Canadian Arctic Expedition 1913-18. Scientific expeditions. Arctic Plants: Morphology and Synonymy 11 B To consider the species as a mere variety of G. maritima, as has been done in recent years, is open to question, and Johanson ^ has written a very instructive paper, demonstrating that G. vilfoidea and G. maritima are not conspecific. Lange gives a good diagnosis of G. vilfoidea (Conspectuslc. p. 170) as follows: "Gracilis, glaberrima, rhizomate obliquo, foliorum fasciculos-abbreviatos et flagella yalde elongata gracilia emittente; foliis anguste linearibus subcompli- catis, acutis; ligula brevi, truncata; panicula brevi, contracta, ramis sub anthesi adpressis, defloratis erecto-patentibus, inferioribus subgeminis, super, solitariis; glumis obtusis inp,equalibus flosculis 2-3, palea inf. ovali, obtusa, ; ''Obs. Species haec, non nisi e Groenlandia et ins. Spidsberg. hucusque cognita, rnodo crescendi aliisque characteribus a G. maritima recedit, etsi hujus tormis quibusdam {G. maritima var. arenaria E. Fries Mant. 2. p. 9) affinis ;. Rguee B. 1. Stolon of Glyceria vilfoidea (Ands.) Th. Fr.;P=the prophyllon (fore-leaf); L= lateral shoot; S=priinary shoot; natural size. (St. Paul island, Bering strait.) 2. Stolon of Catahrosa aguaiica (L.) Beauv.; St = flower-bearing stem; other letters as above; natural size. (Sweden). 3. Two viviparous spikelets of Aira alpina L.; magnification If (Greenland). For a comparison I have drawn the spikelets of both (Fig. A: 4-5 and 6-7). Moreover, as pointed out by Johanson (), the structure of the stolons differs in a marked degree from that of the other species of Glyceria, and seems indeed to be rare, or at least but little known from Gramineae in general. The accompanying text figure (B) shows part of a stolon of G. vilfoidea (fig. 1); in this the main shoot is aerial (S), and bears several green leaves, separated from each other by stretched internodes; at each node a small lateral
Size: 2100px × 1190px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectscienti, bookyear1919
