Otatea C. E Calderon & Soderstr.
Creators: name: Ruiz-Sanchez, Eduardo
name: Clark, Lynn G.
name: Londoño, Ximena
name: Mejía-Saulés, Teresa
name: Rodríguez, Gilberto Cortés
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Liliopsida
Poales
Poaceae
Otatea

description: Otatea (Munro) C. E Calderón & Soderstr.   
Rhizomes pachymorph with short necks; culms hollow or rarely solid, erect to apically arching; culm leaf sheaths well developed, without auricles, fimbriae present, oral setae present or absent; culm leaf blades erect or reflexed, deciduous or persistent; branching intravaginal or rarely extravaginal; nodes with one primary bud developing into 3 subequal branches (sometimes 1, 2 or 6 branches per node); synflorescences paniculate or racemose; spikelets laterally compressed; glumes 2, awned, pubescent, scabrous or glabrous; 3–7 florets; lemmas with prominent awns, palea obtuse, 2-keeled; lodicules 3; stamens 3; stigmas 2; fruit a basic caryopsis (Fig. 7A–F).  
1. Culm leaf blades persistent, the juncture of the sheath and blade abaxially indistinct (the two structures appear continuous), oral setae in culm leaves absent.................................................................................................................................................................2  
1. Culm leaf blades deciduous, the juncture of the sheath and blade abaxially distinct, oral setae in culm leaves present...................4  
 2. Culms hollow; branches per node usually 1, ascending, if two branches present then the lateral narrower than the main or central; foliage leaf blades 6.5–12.5 cm long, 4–12.5 mm wide, patch of white cilia on the abaxial side present....................... O. ramirezii Endemic to Mexico; Querétaro; 1200–1600 m.   
2. Culms hollow or solid; Branches per node 3, subequal or unequal, ascending; foliage leaf blades 6.5–11.5 cm long, 2–4 mm wide, patch of white cilia on the abaxial side present or absent..................................................................................................................3  
 3. Branches Per node 3, subequal; foliage leaf blades 6.5–11.5 cm long, 3–4 mm wide, patch of white cilia on the abaxial side present..................................................................................................................................................................... O. rzedowskiorum Endemic to Mexico; Chiapas; 600–1000 m.   
 3. Branches per node 3, unequal (central branch appears first and is twice the size of the two lateral branches); foliage leaf blades 4.8–6.2 cm long, 2–4 mm wide, patch of white cilia on the abaxial side absent.............................................................. O. victoriae Endemic to Mexico; Hidalgo; 1700–2140 m.   
4. Foliage leaves of the primary branches with blades 0.3–1.2 cm wide, abaxially green....................................................................5  
4. Foliage leaves of the primary branches with blades 0.6–6 cm wide, abaxially glaucous..................................................................8  
5. Culm leaf blades reflexed; foliage leaf oral setae present..................................................................................................................6  
5. Culm leaf blades erect; foliage leaf oral setae absent.........................................................................................................................7  
 6. Foliage leaf blades 18–26 cm long; foliage leaf oral setae 6.6–24 mm long, fimbriae 8.4– 2 mm long, straight; culm leaf oral setae 15–31 mm long, fimbriae 10–19 mm long, straight.......................................................................................................... O. carrilloi Endemic to Mexico; Chiapas; 850–1100 m.   
 6. Foliage leaf blades 10–16 cm long; foliage leaf oral setae 2.5–6 mm long, fimbriae 1–4 mm long, curly; culm leaf oral setae 2.5–11.5 mm long, fimbriae 1.5–4 mm long, curly.............................................................................................................. O. glauca Endemic to Mexico; Chiapas; 1200–1500 m.   
 7. branches per node 3, subequal and ascending; fimbriae on culm leaves 4–7 mm long; some populations develop oral setae on culm leaves.............................................................................................................................................................................. O. acuminata Endemic to Mexico, Pacific slopes, Trans-Mexican Volcanic Belt, Oaxaca, Puebla, Querétaro, Veracruz; 150–2000 m.   
 7. Branch per node usually 1, ascending, if two branches present then the lateral narrower than the main or central; fimbriae on culm leaves 1–3 mm long; oral setae on culm leaves absent.................................................................................................... O. ramirezii   
8. Culm leaf blades reflexed...................................................................................................................................................................9  
8. Culm leaf blades erect......................................................................................................................................................................10  
 9. Foliage leaf oral setae 4.3–6 mm long, free; lobes of the outer ligule absent; culm leaf sheaths 9.5–12.5 cm long, non-overlapping; culm leaf blades 1.6–7.5 cm long...................................................................................................................................... O. ximenae Endemic to Mexico; Michoacán, Oaxaca; 1500–1900 m.   
 9. Foliage leaf oral setae 13–21.5 mm long, connate for the basal one-third or more; lobes of the outer ligule present, 3–8 mm long; culm leaf sheaths 24–29.5 cm long, overlapping; culm leaf blades 9–20 cm long................................................. O. transvolcanica Endemic to Mexico; Colima, Estado de Mexico, Jalisco; 1040–1850 m.   
 10. Oral setae of culm and foliage leaves papyraceous, white; branches per node usually one or two; foliage leaf blades abaxially with a patch of white cilia at the base on both sides of the midrib....................................................................................... O. reynosoana Endemic to Mexico; Guerrero, Jalisco; 1300–1650 m.   
 10. Oral setae of culm and foliage leaves coriaceous, brown or purple; branches per node three, subequal; foliage leaf blades abaxially with a patch of yellow to brown cilia at the base on one side of the midrib.................................................................... O. fimbriata Mexico to Colombia; Chiapas; 1000–1300 m.
description: Published as part of Ruiz-Sanchez, Eduardo, Clark, Lynn G., Londoño, Ximena, Mejía-Saulés, Teresa & Rodríguez, Gilberto Cortés, 2015, Morphological keys to the genera and species of bamboos (Poaceae: Bambusoideae) of Mexico, pp. 1-24 in Phytotaxa 236 (1) on pages 18-19, DOI: 10.11646/phytotaxa.236.1.1, http://zenodo.org/record/13631250