518 BLAKE. 



most nearly approaching it, including V. tenuis Gray and V. gracillima 

 Brandegee, has the phyllaries 2-sub-3-senate and distinctly more 

 numerous, while the pappus is typical of that of Viguiera, consisting 

 of two slender awns sharply differentiated from the four to six 

 shorter squamellae. 



Viguiera adenophylla Blake, n. sp. Herbacea supra raniosa ramis 

 erectis. Caulis purpureo-brunneus plus minusve glanduloso-puberu- 

 lus sursum appresse pilosulus subflexuosus. Folia alterna late ovata 

 acuminata basi cuneata vel abrupte truncata in petiolum cuneate 

 angustata crenato-dentata (dentibus 17-21-jugis depresso-deltoideis 

 mucronatis) apice acuminate integro trinervia supra subappresse 

 pilosula (pilis basi glandularibus vix tuberculatis) infra non pallidiora 

 glandulosa pilosula 8.5-10.5 cm. longa 4.6-7 cm. lata. Petioli glandu- 

 lari-pubescentes 1.8-2 cm. longi. Capitula ca. 26 cymoso-paniculata 

 2.8 cm. lata. Discus 8-13 mm. altus 7-10 mm. crassus. Involucri 

 6 mm. alti biseriati subgradati squamae lanceolatae vel ovato-lanceo- 

 latae acutae subherbaceae basi plus minusve induratae costatae in 

 margine et plus minusve dorsaliter sordide albido-pilosiusculae et 

 glandulosae. Radii 8 flavi ovales emarginati in venis dorsi puberuli 

 10-12 mm. longi 5.5-6 mm. lati. Corollae disci flavae subappresse 

 pilosulae 6 mm. longae (tubo 1.3 mm.) faucibus campanulato-infundi- 

 buliformibus. Paleae oblongae mucronatae acutae margine flavidae 

 apice eroso-denticulatae dorso sordide pilosiusculae parce glandulosae 

 8-9 mm. longae. Achaenia (immatura) sericea. Aristae 2 paleaceae 

 oblongo-lanceolatae acutae vel obtusae fimbriatae inaequales 2.8- 

 3.5 mm. longae; squamellae 4 longiores liberae oblongae lacerato- 

 fimbriatae ca. 1.2 mm. longae et ca. 4 parvae intermediae laceratae. — 

 San Luis Potosi: alt. 1830-2440 m., 1878, Parry & Palmer 467 

 (type coll.: Brit. Mus., Gray Herb., Kew). — Not closely related 

 to any other species. 



Viguiera angustifolia (H. & A.) Blake, n. comb. — Tithonia 

 pachycephala H. & A. ! Bot. Beech. Voy. 299 (1840), not DC. (err. 

 iden.). T. angustifolia H. & A. ! 1. c. 435 (1841). Viguiera blepharo- 

 lepis Gray! Proc. Am. Acad. xix. 5 (1883). — The type of Tithonia 

 angustifolia H. & A. (Tepic, Sinclair, hb. Kew.) is identical with 

 Seemann 1481, from Cerro de Pinal, type collection of V. blepharo- 

 Icpis, and not at all the same as V. bucldleiacformis (DC.) B. & H. f., 

 although considered by Bentham (B. & H. f. Gen. ii. 375 (1873)) to 

 be identical with the latter species. The only previous Viguiera 

 angustifolia, that of Glaziou, Mem. Soc. Bot. France, iii. 412 (1910), 

 is merely a nomen nudum. 



