Variation in Galium palustre s. lat. in the Baltic land‐uplift area
作者:
Karin Apelgren,
Rolf Lernstål,
期刊:
Nordic Journal of Botany
(WILEY Available online 1991)
卷期:
Volume 10,
issue 6
页码: 565-592
ISSN:0107-055X
年代: 1991
DOI:10.1111/j.1756-1051.1991.tb02100.x
出版商: Blackwell Publishing Ltd
数据来源: WILEY
摘要:
Morphological variation, chromosome numbers, reproductive system and ecology were studied inGalium palustres. lat. in some areas in the Baltic land‐uplift area. Two cytotypes were found; diploids with 2n = 24 and octoploids with 2n = 96. Each cytotype comprises a large amount of habitat‐correlated variation. Despite this, it is fairly easy to destinguish morphologically between the two cytotypes. It is therefore suitable to treat the diploid cytotype as one species,Galium palustres. str., and the octoploid cytotype as another species,Galium elongatum. Both species grow in wet places, such as ditches, lake‐shores and wet woodland. There are practically no differences in habitat ecology between them, but a slight tendency can be discerned for octoploids to grow in localities which never dry out, while diploids can grow in drier localities. OnlyG. palustres. str. grows on fairly exposed sea‐shores. A morphologically distinct from can also be distinguished, including diploids from sea‐shores and coastal areas below 5 m. a. s. 1. This ecotype is described asGalium palustrevar.balticumvar. nov. It is characterised by smooth or nearly smooth stems and short, narrow leaves. It has always a very rich flowering and fruit set, which may be regarded as an adaptation to coastal c
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