Part 2, 1915] CARDUACEAE : TAGETEAE 163 



long; principal bracts linear, acuminate, with 3 conspicuous glands, the median and higher 

 gland with a spinous ascending horn; accessory bracts with a single gland and bristle-like 

 division. Receptacle convex, favose, each areola surrounded by a membranous erose cup 

 with several bristle-points. Ray-flowers few, pistillate and fertile, or wanting. Disk-flowers 

 numerous; corolla-tube slender, equaling the trumpet-shaped throat; lobes lanceolate. Style- 

 branches abruptly short- and slender-appendaged from an obtuse subpenicillate tip. Achenes 

 subclavate, striate. Pappus of many squamellae, at least the inner dissected into 7-10 

 bristles. 



Type species, Lebetina cancellata Cass. 



Pappus with an outer set of entire, cuneate-obovate squamellae; heads radiate. 



Ligules conspicuous, 7-9 mm. long, spreading. 1. /,. cancellata. 



Ligules inconspicuous, about 3 mm. long. 2. L. cubana. 



Pappus of dissected squamellae only; heads usually discoid. 3. L. Porophyllum. 



1. Lebetina cancellata Cass. Diet. Sci. Nat. 25: 395. 1822. 



Dyssodia Porophyllum Willd. Enum. 900. 1809. Not D. porophylla Cav. 1803. 



Boebera Porophyllum Less. Syn. Gen. Comp. 237. 1832. Not B. Porophyllum H. B. K. 1820. 



Adenophyllum Porophyllum Hemsl. Biol. Centr. Am. Bot. 2: 218, mainly. 1881. 



Dyssodia cancellata A. Gray, Proc. Am. Acad. 19: 38. 1883. 



Tagetes cancellata Maza, Anal. Soc. Esp. Hist. Nat. 19: 276. 1890. 



A branched annual; stem 3-10 dm. high, angled and striate, glabrous; leaves alternate, 



pinnately cleft, with rounded sinuses and oblong-toothed lobes, some of the teeth ending in 



long bristles; glands large, marginal in the sinuses and nearly terminal in the lobes; heads 



corymbose-paniculate; peduncles 3-8 cm. long, bracteate; involucre turbinate, 10-12 mm. high, 



12-15 mm. broad; accessory bracts 6-7, pectinately dissected, with 3-5 pairs of bristle-like 



divisions and a single large gland; principal bracts about 15, keeled, glabrous, acuminate, the 



horn 1-2 mm. long; ligules orange, elliptic, 7-9 mm. long, spreading; disk-corollas about 



7 mm. long, the cylindric tube, trumpet-shaped throat, and lanceolate lobes of about the same 



length; achenes 5 mm. long, striate, glabrous; pappus distinctly double; inner squamellae 



5 mm. long, divided into 7-10 bristles, the outer spatulate, 1 mm. long, barely erose. 



Type locality: Cultivated in the Royal Garden of Paris, of unknown origin. 

 Distribution: Chihuahua and Sonora to Yucatan and Jalisco. 



2. Lebetina cubana Rydberg, sp. nov. 



A glabrous annual; stem 3-6 dm. high, striate or somewhat angled; leaves 2-4 cm. long, 



alternate, pinnately parted, the lower into obovate or spatulate, the upper into cuneate- 



oblong, toothed divisions, some of the teeth bristle-pointed; glands large, marginal in the 



sinuses and subterminal in the lobes; heads corymbose, on bracted peduncles 3-8 cm. long; 



involucre turbinate, 7-10 mm. high, 8-12 mm. broad; accessory bracts 10-15, pectinate with 



3-4 pairs of setaceous divisions; principal bracts 15-18, acuminate, the horn 1 mm. long; 



ligules oblong, 3 mm. long; disk-corollas 5 mm. long, the tube and throat equal, the lobes 



lanceolate, somewhat shorter; achenes 4 mm. long, striate; pappus double; inner squamellae 



dissected into 7-9 bristles, 5 mm. long; outer squamellae oblong-spatulate, 1 mm. long. 



Type collected near Havana, Cuba, December 3, 1904, A. H. Curtiss 548 (herb. N. Y. Bot. 

 Gard.). 



Distribution: Western Cuba. 



3. Lebetina Porophyllum (Cav.) Rydberg. 



Pteronia Porophyllum Cav. Ic. 3: 13. 1794. 



Dyssodia porophvlla Cav. Anal. Cienc. Nat. 6: 334. 1803. 



Boebera Porophyllum H. B. K. Nov. Gen. & Sp. 4: 198. 1820. 



? Adenophyllum capillaceum DC. Prodr. 5: 638. 1836. 



? Schlechtendalia capillacea Moc. & Sesse; DC. Prodr. 5: 638, as synonym. 1836. 



Boebera alternifolia Moc. & Sesse; DC. Prodr. 5: 639, as synonym. 1836. 



? Dyssodia alternifolia Regel & Korn. Ind. Sem. Hort. Petrop. 1857: 41. 1857. 



Adenophyllum Porophyllum Hemsl. Biol. Centr. Am. Bot. 2: 218. 1881. 



Lebetina' porophylla A. Nelson, Bot. Gaz. 47: 435. 1909. 



A branched annual; stems 3-7 dm. high, glabrous, striate, with ascending branches above; 

 leaves alternate, 2-5 cm. long, pinnately parted into oblong or obovate toothed divisions, 



