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Key to the native broadleaf trees of Montana

Source: R/keys.R
montana.Rd

A dichotomous key to the eleven native broadleaf (hardwood) trees of Montana, as a table of leads (see keyFromLeads()); montanaKey() turns it into a dimoose key with photos. Written for dimoose: native status was checked in the Montana Field Guide and USDA PLANTS, and every couplet's characters come from Montana Field Guide or Virginia Tech Dendrology descriptions. Common hackberry is left out because the Montana Field Guide gives its origin in Montana as undetermined.

Usage

montana

Format

A data frame with 20 rows (10 couplets) and 7 character columns:

Statement

Couplet number.

Choice

a or b.

Character

Text of the lead.

Next

Couplet the lead leads to, or "-".

Taxon

For terminal leads, "Common name (Genus species)".

Question

What the couplet asks, e.g. "Leaf type?".

Image

Ids of the photos in inst/extdata/montana/ shown with the lead, separated by ;.

Source

Montana Field Guide, Montana Natural Heritage Program and Montana Fish, Wildlife & Parks, https://fieldguide.mt.gov; USDA PLANTS Database, https://plants.usda.gov; Virginia Tech Dendrology fact sheets, https://dendro.cnre.vt.edu. The page for each species and the source of each couplet are listed in data-raw/montana/sources.md in the package sources.