Montanoa imbricata  

Frutices 4-metrales. Caules quadrangulares basin versus teretiores grisescentes, partibus herbaceis puberuli. Folia vix variabilia; petioli 2-18 cm longi, interdum partim foliolis alata, glandulosa et dense pilis minus quam 1.0 mm longis pubescentes; laminae ovatae vel 5-angulatae , 4-34 x 3-38 cm, apice acutae, margine serratae vel ± profunde-lobatae, pagina adaxiali glandulosa, pagina abaxiali glandulosa et sparsim vel dense pilis minus quam 1.0 mm longis pubescenti. Pedunculi 2-10 cm longi, glandulosi modice vel dense pilis minus quam 1.0 mm longis pubescentes. Capitula pendula florifera 1.75-2.25 cm fructifera 3.0-3.5 cm lata, nonnulla vel muita in synflorescentia laxe cymosa corymbis composita, ramis lateralis effuse ascendentibus. Phyllaria 8-11, 2-3-seriata, non reflexa, inter se subaequalia, ovato-lanceolata, imbricata , 10-12 x 3.0-4.5 mm, viridia, apice acuta vel acuminata mucro nata, marginibus ciliata integra, pagina adaxiali dense pilis minus quam 1.0 mm longis pubescenti, pagina abaxiali glabra. Radii 12, albi, ligula ovata vel lanceolata, 18-27 x 8-10 mm, apice acuta vel 2-denticulata, pagina adaxiali subglabra, pagina abaxiali sparsim glandulosa, tubo 1.0 x 0.5 mm, subglandulosa. Flosculi disci 80-100, lutei, tuba 1.5 x 0.5 mm, glabro vel subglanduloso et pilis minus quam 0.5 mm longis subpubescenti, fauce cylindraceo 3.5-4.0 x 1.25-1.5 mm, glanduloso et modice pilis minus quam 0.5 mm longis pubescentia, lobis 5, 0.75-1.0 x 0.5-0.75 mm, apice acutis glandulosis et modice pilis minus quam 0.5 mm longis pubescentia; stamina filamento inciuso 3.5-4.0 x 2.5 mm, antheris semi-exsertis, thecis luteis, 2.25 x 0.5 mm, connectivo apice acuto, 0.6 x 0.4 mm, luteo, adaxiali glanduloso; stylus luteus, 8.0-8.5 mm longus, basi tumefactus, lineolis stigmatic is luteis vel brunneolis, 1.25 mm longis, appendiculis acuminatis, 0.75 x 0.4 mm, apice luteis. Paleae sub anthesi obtrullatae, 2.5-3.0 x 2.5-3.0 mm, luteolae secus venas atrovirides, apice longiuscule acuminatae, induratae, margine ciliatae integrae, dorso glandulosae et distaliter et dense pilis minus quam 1.0 mm longis pubescente~, ventre glabrae; paleae fructiferae deciduae, obtrullatae, 15 x 8 mm, papyraceae, reticulatim venosae, stramineae, apice spina minus quam 0.75 mm longa obsitae margine integrae ciliatae, abaxialiter dense glandulosa et sparsim pubescentes, adaxialiter glabrae. Achaenia brunneo-nigra, 4.5 x 1.25 mm laevia. Chromosomatum numerus n = 19.

SPECIMENS EXAMINED: MEXICO. GUERRERO: 6 mi N of Tierra Colarada 10 Dec 1966, AL 4506 (MICH, OS); 14-14.5 mi N of Tierra Colorada, 10 Dec 1966, AL 4509 (MICH, OS); hwy 95 near jct with rd to Acahuizotla, 14 Nov 1977, FOe 2332 (OS); near Xaltignagllis, 14 Nov 1977, FOe 2344 (OS); between Tierra Colorada and Chilpancingo, km 39, 15 Nov 1977, FOe 2349 (OS); 8.9 mi N of Tierra Colorada, 16 Nov 1978, FRi 2841* (OS); 11.7 mi N of Tierra Colorada, 16 Nov 1978, FRi 2842 (OS); Mina, Campo Morado-Otallan, 13 Nov 1939, Hinton 14832 (K, GH, MICH, NY, TEX, US); Rincon Viejo, 4 Dec 1962, Kruse & Rzedowski 1211 (ENCB). MICHOACAN: 15-16 km SE of Aserradero Dos Agllas, 25-26 Nov 1970, M 24697 (ENCB, MICH); 63.6 km from Temascal on rd to Hlletamo, 13 Nov 1949, Moore et al. 5694 (BH, BM, F, UC); 19.8 km from Temascal on rd to Hlletamo, 13 Nov 1949, Moore et al. 5711 (BH, BM, F, GH, UC).