Carex (sect. Ammoglochin) Dumort.
Creators: name: Koopman, Jacob
name: Więcław, Helena
name: Kobierski, Piotr
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Liliopsida
Poales
Cyperaceae
Carex

description: Key to identification of species within section Ammoglochin and Carex disticha
When constructing the key, both data from Poland and other European countries have been taken into account (plants collected during fieldwork in Belgium, the Netherlands, Germany, the Czech Republic, Austria, Armenia, Bulgaria) as well as herbarium material from B—Berlin-Dahlem, DE; L—Leiden, NL and W—Vienna, AT).
1a. All spikes with female flowers at the top ......................................................................................................................................... 2
1b. At least one spike with male flowers at the top ................................................................................................................................ 6
2a. Utricles usually more than 4 mm long, conspicuously veined ......................................................................................................... 3
2b. Utricles usually less than 4 mm long, obscurely veined .................................................................................................................. 4
3a. Leaves 1–2 mm wide, shorter than the stems; female glumes reddish-brown with pale or green midrib and hyaline margins.......... .................................................................................................................................................................................... Carex colchica
3b. Leaves 2–3 mm wide, exceeding stems; female glumes pale, whitish with green midrib ............................ Carex pseudobrizoides
4a. Leaves not more than ½ as long as the stems; later in the season the leaves get more elongated and may exceed the fruiting stems; spikes dark brown; spikes straight; utricles usually less than 3.5 mm, narrowing suddenly into the beak ................ Carex praecox
4b. Leaves exceeding the stems; at least the middle spikes usually slightly curved; utricles usually more than 3.5 mm, tapering into the beak ................................................................................................................................................................................................... 5
5a. Spikes pale whitish-cream; utricles narrow, not wider than 1.5–2 mm; ratio of utricle length/utricle width around 3.6 ................... ................................................................................................................................................................................... Carex brizoides
5b. Spikes light brown; utricles more than 2.4 mm wide; ratio of utricle length/utricle width around 2.8 ...................... Carex curvata
6a. Middle spikes entirely male ........................................................................................................................................ Carex disticha
6b. Middle spikes with both male and female flowers ........................................................................................................................... 7
7a. Middle spikes with female flowers above and male below ........................................................................... Carex pseudobrizoides
7b. Middle spikes with male flowers above and female below, sometimes all spikes with female flowers at the top .......................... 8
8a. Utricles broad, 1.80–2.38 mm, conspicuously veined; nuts well-developed ............................................................ Carex arenaria
8b. Utricles narrow, 1.30–1.50 mm, obscurely veined; nuts seldom well-developed ........................................................ Carex repens
description: Published as part of Koopman, Jacob, Więcław, Helena & Kobierski, Piotr, 2022, Carex section Ammoglochin (Cyperaceae) in Poland, pp. 1-34 in Phytotaxa 575 (1) on page 23, DOI: 10.11646/phytotaxa.575.1.1, http://zenodo.org/record/7403254