eq {shipunov}

eq

Description

Horsetails (Equisetum) are the old, pre-dinosaur plant lineage. Only several dozen species survived, but despite a long evolution the borders between these species are still unclear for researchers.

In 2005–2006, morphometric analysis was performed of more than 1,000 horsetail plants belong to most widespread Eurasian species growing in Middle Russia. For the analysis, we used 8 morphological characters and also tried to identify species.

'eq_l' contains population locations and species determinations.

'eq_s' and 'eq' are actual morphometric data, but 'eq' contains only 2 species out of 8.

Usage

eq
eq_l
eq_s

Format

This data frame contains the following columns:

DL.R

plant height, mm

DIA.ST

maximal diameter of stem, mm

N.REB

number of ridges on a stem

N.ZUB

number of teeth (reduced leaves)

DL.OSN.Z

length of tooth base

DL.TR.V

length of sheath

DL.BAZ

length of basal segment of branch

DL.PER

length of first (after the basal) segment of branch

SPECIES

preliminary species determination

N.POP

population number

WHERE

population location (region)