作者: Thomas W. Mulroy , Philip W. Rundel
DOI: 10.2307/1297607
关键词: Ephemeral key 、 Ecology 、 Annual plant 、 Desert (philosophy) 、 Geography 、 Spring (hydrology)
摘要: western Mexico, two groups of ephemeral annual plants have been recognized. One group, the winter annuals, consists species that germinate and complete their life cycles during spring months; other summer includes early fall months (Shreve 1951, Went 1948). Normally, seasonal occurrences these