Pelekium Mitt.
Creators: name: Phephu, Nonkululo
name: Rooy, Jacques Van
name: Van Wyk, Abraham E.
Publisher: name: Zenodo
Year: 2013
Subjects: Biodiversity
Taxonomy
Plantae
Bryophyta
Bryopsida
Hypnales
Thuidiaceae
Pelekium

description: Key to the species of Pelekium Mitt. in Africa   
 1. Plants mostly minute to small (stems ≤ 50 mm long); paraphyllia simple, short (usually ≤ 7 cells long).................. 8   
 - Plants medium-sized (stems> 50 mm long); paraphyllia simple to weakly branched, short or long (usually ≥ 8 cells long)............................................................................................................................................................................. 2   
 2. Terminal cells of paraphyllia and stem leaves predominantly acute................................................. P. ramusculosum   
 - Paraphyllia and stem leaf terminal cell mostly truncate.............................................................................................. 3   
 3. Stem leaves mostly not plicate; margins plane; apex broadly acute.............................................................. P. varians   
 - Stem leaves plane to weakly plicate; margins recurved below, plane above; apex acute, acuminate or apiculate..... 4   
 4. Stem leaf apex long apiculate; seta strongly hispid...................................................................................... P. velatum   
 - Stem leaf apex acute or acuminate; seta smooth or roughened throughout................................................................. 5   
 5. Stems 2- or 3-pinnately branched; laminal cells uni- or bipapillose; perichaetial leaf shoulders ciliate; seta smooth.................................................................................................................................................................. P. chenagonii   
 - Stems 1- or 2-pinnately branched; laminal cells uni- to pluripapillose; perichaetial leaf shoulders ciliate or eciliate; seta roughened throughout 6   
 6. Stems 1- or 2-pinnately branched; laminal cells mostly unipapillose, mixed with bi- to pluripapillose ones; perichaetial leaf shoulders eciliate....................................................................................................................... P. thomeanum   
 - Stems 2-pinnately branched; laminal cells bi- to pluripapillose; perichaetial leaf shoulders ciliate........................... 7   
 7. Paraphyllia few, mostly simple; stem leaves plane to weakly plicate............................................ P. pseudoinvolvens   
 - Paraphyllia abundant, mostly weakly branched; stem leaves mostly plane.................................................. P. gratum   
 8. Plants wiry; stems irregularly branched; paraphyllia almost absent; stem leaf cells thin-walled.................. P. investe   
 - Plants not wiry; stems regularly branched; paraphyllia abundant; stem leaf cells thick-walled................................. 9   
 9. Stems 2-pinnately branched; paraphyllia simple, short; laminal cells with 1–3 papillae; perichaetial leaf shoulders eciliate; seta rough at neck......................................................................................................................... P. versicolor   
 - Stems 1-, 2-, or 3-pinnately branched; paraphyllia simple to weakly branched; laminal cells with 1 or 2 papillae; perichaetial leaf shoulders ciliate or not; seta smooth or rough at neck.................................................................... 10   
 10. Stems (1–)2(–3)-pinnately branched; paraphyllia abundant; perichaetial leaf shoulder eciliate; seta rough at neck..... ................................................................................................................................................................ P. contortulum    
 - Stems (1–)2-pinnately branched; paraphyllia few perichaetial leaf shoulders ciliate or not; seta smooth or rough at neck 11   
 11. Paraphyllia simple to weakly branched; stem leaves plane to weakly plicate; laminal cells uni- or bipapillose; perichaetial leaf shoulders eciliate; seta smooth....................................................................................... P. intricatum   
 - Paraphyllia simple; stem leaves plane; laminal cells unipapillose; perichaetial leaf shoulders ciliate; seta rough at neck P. minusculum
description: Published as part of Phephu, Nonkululo, Rooy, Jacques Van & Van Wyk, Abraham E., 2013, New combinations and a key to the species of Pelekium (Thuidiaceae) in sub- Saharan Africa and the East African Islands, pp. 60-64 in Phytotaxa 84 (2) on pages 63-64, DOI: 10.11646/phytotaxa.84.2.3, http://zenodo.org/record/5071748