STANDLEY TTJEES AND SHRUBS OF MEXICO. 1169 



4. MACROSCEPIS H. B. K. Nov. Gen. & Sp. 3: 200. 1819. 



Stems scandent, suffrutescent, setose-hirsute; leaves cordate; cymes usually 

 subsessile, the flowers large ; calyx 5-lobate, eglandular ; corolla short-salver- 

 form, the tube ovoid or campanulate, constricted in the throat, the lobes 

 spreading, contorted in bud ; corona adnate to the corolla tube, composed of 

 5 fleshy inflesed subexserted scales ; stigma plane or umbonate ; follicles fleshy ; 

 seeds with an apical tuft of hairs. 



Sepals acuminate 1. M. obovata. 



Sepals obtuse 2. M. rotata. 



1. Macroscepis obovata H. B. K. Nov. Gen. & Sp. 3: 201. pi. 133. 1819. 



San Luis PotosI to Oaxaca, Chiapas, Veracruz, and Campeche ;• type from 

 Oampeche. 



Stems fulvous-hirsute ; leaves obovate to rounded-obovate, 6 to 17 cm. long, 

 abruptly short-acuminate, deeply cordate at base, hirsute, especially beneath ; 

 cymes sessile, few-flowered, the flowers pedicellate ; sepals hirsute and ciliate ; 

 corolla 2 to 2.5 cm. broad, hirtellous or glabrate outside, glabrous within, the 

 lobes obtuse. 



2. Macroscepis rotata Decaisne in DC. Prodr. 8: 599. 1844. 

 Type from Yucatan. 



Leaves obovate, short-acuminate, cordate at base ; peduncles short, 2 or 3- 

 flowered ; sepals ovate ; corolla subrotate, the lobes ovate, obtuse. 



Perhaps only a form of M. obovata. Decaisne states that the sepals are 

 "only half as long as in the latter species. 



5. FITN-ASTBUM: Fourn. Ann. Sci. Nat. VI. 14: 388. 1882. 



Plants scandent, herbaceous or fruticose ; leaves petiolate ; flowers white or 

 purplish, in axillary umbel-like cymes ; calyx small, 5-parted ; corolla sub- 

 rotate, 5-lobate, the lobes contorted ; exterior corona annular, adnate to the 

 corolla ; interior corona of 5 broad fleshy scales ; pollinia pendulous ; follicles 

 smooth, terete. 



Leaves linear or, if broader, obtuse or acute at base (linear leaves sometimes 

 cordate-hastate at base). 



Leaves crispate 1. F. crispum. 



Leaves plane. 



Leaves linear, sometimes hastate-cordate. 



Corolla lobes obtuse or acute 2. F. cumanense. 



Corolla lobes acuminate 3. F. heterophyllum. 



Leaves lance-oblong to elliptic, obtuse at base 4. F. clausum. 



Leaves deltoid, ovate, or broader, conspicuously cordate at base. 

 Leaves white-tomentose beneath. 



Leaves orbicular 5. F. rotundifolium. 



Leaves ovate or elliptic 6. F. pannosum. 



Leaves glabrous or pubescent beneath, never tomentose. 



Stems glabrous or nearly so 7. F. cynanchoides. 



Stems densely pubescent. 

 Umbels sessile or subsessile. 



Corolla lobes papillose within 8. F. lindenianum. 



Corolla lobes not papillose within 9. F. bicolor. 



