Chascolytrum (sect. Hildaea)
Creators: name: Da Silva, Leonardo N.
name: Saarela, Jeffery M.
name: Sokoloff, Paul C.
name: Essi, Liliana
name: De Souza-Chies, Tatiana T.
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Liliopsida
Poales
Poaceae
Chascolytrum

description: Taxonomic key for the species of Chascolytrum sect. Hildaea
1. Lemmas with a gibbous back distinct from the margins, back papillate.............................................................................................. ......................................................... C. uniolae (Nees von Esenbeck 1829: 494) Essi, Longhi-Wagner & Souza-Chies (2011: 329)
- Lemmas without a gibbous back distinct from the margins, or only slightly distinct, back glabrous or strigose, smooth or rough ... ...........................................................................................................................................................................................................2.
2. Lemmas with a length/width ratio less than 2.5, cordate at the base ................................................................................................3.
- Lemmas with a length/width ratio more than 2.5, attenuate at the base ...........................................................................................5.
3. Paleas villose ............................. C. juergensii (Hackel 1915: 76) Essi, Souza-Chies & Longhi-Wagner (2010: 153) var. juergensii
- Paleas glabrous ..................................................................................................................................................................................4.
4. Spikelets oblong, subcylindrical; lemmas apices acuminate to caudate .............................................................................................. ......................................................................................................... C. latifolium Essi, Souza-Chies & Longhi-Wagner (2010: 151)
- Spikelets elliptic, laterally compressed; lemmas apices obtuse to acute, occasionally mucronate...................................................... ......................................................................... C. calotheca (Trinius 1831: 414) Essi, Longhi-Wagner & Souza-Chies (2011: 328)
5. Lemmas strigose................................................................................................................................ C. juergensii var. angustilemma
- Lemmas glabrous...............................................................................................................................................................................6.
6. Paleas puberulous on the back, more than 3/4 the length of the lemmas......................................................................... C. serranum
- Paleas glabrous on the back, less than 3/4 the length of the lemmas ............................................................................. C. ambiguum
description: Published as part of Da Silva, Leonardo N., Saarela, Jeffery M., Sokoloff, Paul C., Essi, Liliana & De Souza-Chies, Tatiana T., 2020, Chascolytrum serranum (Poaceae: Pooideae: Poeae: Calothecinae), a new microendemic species from Campos de Cima da Serra, southern Brazil, pp. 41-49 in Phytotaxa 435 (1) on page 47, DOI: 10.11646/phytotaxa.435.1.5, http://zenodo.org/record/13875329