Part 2, 1915] 



CARDUACEAE: TAGETEAE 



149 



pcdunclcd, solitary at the ends of the branches or in leafy cymes. Involucre more or less 

 cylindric, fusiform, or campanulatc, of a single series of 3-10 narrow bracts, united to near tin- 

 apex and bearing two rows of glands, one on each side; calyculum wanting. Receptacle favose. 

 Ray-flowers usually present, few, pistillate, fertile; ligules often broad, yellow or orange, rarely 

 white, entire, deeply notched or obtusely 3-lobed. Disk-flowers several, hermaphrodite and 

 fertile; corolla-tube cylindric, narrow, usually shorter than and gradually enlarging into the 

 trumpet-shaped or elongate-funnelform throat; lobes triangular to lanceolate. Achenes 

 elongate, clavate, somewhat flattened or angled or terete, rarely striate, glabrous or short- 

 pubescent. Pappus-squamellae 3-10, very unequal, often more or less united, 1 or 2 (rarely 

 3-5) of them linear, subulate, or bristle-like, acute, scabrous-hispidulous, much longer than 

 the rest, which are from linear to obovate and usually truncate or rounded at the apex. 

 Type species, Tagetes patula L. 



Leaves simple. 



Perennials; ligules distinctly exserted, orbicular. 



Inflorescence dense, flat-topped, the individual peduncles usually 

 less than 1 cm. long. 

 Bristles of the pappus about 5 mm. long; involucres 7-10 mm. 

 long. 

 Leaves elliptic or broadly oblong; involucre more or less 



minutely pubescent when young. 

 Leaves linear; involucre glabrous from the beginning. 

 Bristles of the pappus about 3 mm. long; involucres about 5 mm. 

 long. 

 Inflorescence more open; the individual peduncles usually more than 

 1 cm. long; leaves linear. 

 Annuals; ligules scarcely exceeding the involucre. 

 Leaves linear, serrate. 

 Leaves filiform, entire-margined. 

 Leaves pinnatifid. 



Ligules large, 1 cm. long or more. 

 Perennials. 



Peduncle strongly thickened under the head; leaflets oval. 

 Outer, shorter squamellae not lacerate. 

 Outer, shorter squamellae lacerate. 

 Peduncle not strongly thickened below the head; leaflets narrower. 

 Disk-flowers with well-developed pappus. 



Leaflets narrowly lanceolate or oblanceolate, serrate. 

 Plant glabrous or minutely puberulent. 



Involucre elongate-turbinate, with 5-6 glands in each 



vertical row. 

 Involucre campanulate-turbinate, with 4 glands in 

 each vertical row. 

 Plant distinctly pubescent. 

 Leaflets linear or subulate and entire, or else again divided 

 into subulate divisions. 

 Leaflets linear, elongate, soft, entire. 



Leaflets of the upper leaves short, subulate, those of 

 the lower leaves again divided into subulate divisions; 

 divisions awn-pointed. 

 Disk-flowers with minute pappus or none. 

 Annuals. 



Plant more or less hairy. 



Pappus-squamellae all elongate, acute or attenuate; glands of 

 the leaflets scattered. 

 Squamellae nearly as long as the disk -corollas. 

 Squamellae about half as long as the disk-corollas. 

 Pappus-squamellae very uneven, one elongate, subulate, awn- 

 tipped, one or two linear, acute, and some small, oblong, 

 with rounded tips; glands of the leaflets mainly only one at 

 the base of each tooth. 

 Plant glabrous. 



Pappus-squamellae all elongate. 



Involucre usually about 2 cm. long; glands of the lower 



half in 3 — 1 series, linear-oblong. 

 Involucre 1—1.5 cm. long; glands of the lower half in 2 series, 

 elongate, narrowly linear. 

 Leaflets lanceolate, with more than one row of glands 

 on each side of the midrib; glands usually irregu- 

 larly scattered. 

 Teeth of the leaves not salient. 

 Achenes hispidulous all over. 

 Achenes hispidulous on the margins only. 

 Teeth of the leaves salient; achenes hairy. 

 Leaflets narrowly linear-lanceolate; glands mostly in one 

 row on each side of the midrib. 



T. Parryi. 

 T. lacera. 



8. T. Lemmoni. 



9. 



15. 



Palmeri. 

 alamensis. 



10. T. lini folia. 



T. slenophylla. 

 T. Hartwegii. 



T. subvillosa. 



T. zypaquirensis. 



15. T. alamensis. 



16. T. erecla. 



17. T. patula. 



18. T. remoti flora. 



19. T. elongata. 



20. T. tenuifolia. 



