July 24, 2020

How to Exclude Certain Taxa from a Search

At the end of the search URL, add "&without_taxon_id=" + the id of the taxon to be excluded. I'm not sure if there's an easier way, but for now how I find the taxon id is by going to the taxa info page and finding it in the url. If you want to exclude more than one taxa, separate each taxon id with a comma (and no spaces).

For example, if I want to search for orchids but not for Epipactis helleborine (50717) in the "Explore" function, I would start off with https://www.inaturalist.org/observations?place_id=any&taxon_id=47217 and end with https://www.inaturalist.org/observations?place_id=any&taxon_id=47217&without_taxon_id=50717.

Posted on July 24, 2020 00:49 by catullus catullus | 0 comments | Leave a comment

June 22, 2020

Resources for Identifying Orchids

North America

eFloras: http://www.efloras.org/
ResearchGate

Europe

POWO: http://www.plantsoftheworldonline.org/
'Field Guide to the orchids of Europe and the Mediterranean'
ResearchGate
Posted on June 22, 2020 01:32 by catullus catullus | 0 comments | Leave a comment

June 21, 2020

June 20, 2020

Things I've Learned About Identifying Orchids (work in progress)

This is a work in progress. I understand that there are many more North American/European genera, and that within the genera I have listed there are species that I have not covered.

This is not so much a dichotomous key as a series of notes/observations about various species.

Calypso (monotypic genus)

C. bulbosa
var. americana: yellow beard, usually with small dark spots in beard region. lip otherwise unpatterned.
var. occidentalis: lacks yellow beard. lip patterned with light red spots.

Cleistesiopsis

C. bifaria: generally pale lip, not coastal, more lip ridges.

C. divaricata: generally pink lip, less lip ridges.

C. oricamporum: generally pale lip, coastal.

Corallorhiza

C. maculata: spotted lip. 3 veins on lateral sepals. floral remnants point in the same direction as the seed capsule.
var. occidentalis: expanded middle lobe on lip
var. maculata: narrow lip with parallel edges
(other varieties further south near/in Mexico exist; I tend to avoid naming a specific variety when identifying C. maculata found near the border/in Mexico)

C. mertensiana: often purple throughout, long perianth parts, prominently arching column, mentum (spur) prominent. floral remnants nearly perpendicular to seed capsule. (a pure pale yellow form exists)

C. odontorhiza: flowers often cleistogamous (chasmogamous forms exist). seed pods usually greenish. dorsal sepal short, 1-veined. galea present, usually. appears in fall (August-October)

C. striata: striped perianth parts
var. striata: normal pink/red coloration
var. vreelandii: yellow coloration; small, half-opened flowers. there may be more, but I don't know.

C. trifida: greenish-yellow. lateral sepals thin, 1 vein. circumpolar.

C. wisteriana: flowers chasmogamous. dorsal sepal long, 3-veined. galea present, usually. appears in spring/summer (January-July)

Cypripedium (needs more work)

C. acaule: pouch opens with a vertical slit. plants has two ground-hugging leaves.
fma. acaule: pink lip
fma. albiflorum: white lip, yellow-green perianth parts (validity of this form is questionable)

C. guttatum: pink spots on white pouch. petals are thin/lanceolate and point in the direction of the pouch (downwards or forwards).

C. reginae: pink pouch opens upwards. (needs more work)

C. yatabeanum: yellow/brown/green spots on white pouch. petals are pandurate and face outwards, almost reflexed.

Goodyera (needs more work)

G. oblongifolia: noticeable main white stripe down the center of the leaf. other white patterning, thinner than the middle stripe, originates from the middle stripe and usually does not reach the leaf's edges. leaves usually longer.

G. pubescens: less noticeable main white stripe down the center of the leaf. the leaf is usually entirely patterned with lines that are close in thickness to the middle stripe. leaves usually shorter.

G. repens: lacks middle white stripe. the patterning seems to originate from the edges of the leaves instead. leaves shorter.

Platanthera (needs more work)

in Europe:

P. bifolia: anther stalks parallel and close to each other

P. chlorantha: anther stalks further apart and diagonal to each other.

Posted on June 20, 2020 18:39 by catullus catullus | 0 comments | Leave a comment

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