Part 2, 1915] CARIH'ACKAK : TAGETEAE 107 



8. BOEBERA Willd. Sp. PI. 3: 2125. 1804. 



Dyssodia Cav. Descr. 202. 1802. Not Dysoda Lour. L790. 

 Rosilla Less. Syn. Comp. 245. 1832. 



Annual or perennial herbs. Leaves opposite or the upper alternate, pinnately or bipin- 

 nately dissected. Heads usually radiate. Involucre hemispheric, turbinate or bmadl . 

 panulate, with a distinct calyculum; principal bracts S-K), broad, thin and somewhal Karious 

 on the margins, with thicker backs, and 3-7 conspicuous gland oi about tin- 



same number, narrow, not thin on the margins, two- thirds or three-fourths as long. Receptacle 

 puberulent. Ray-flowers pistillate and fertile; ligules oblong to rounded oval, yd! 

 orange. Disk-flowers many; tube rather thick, cylindric, about equaling and differ- 



entiated from the nearly cylindric or somewhat trumpet-shaped throat ; lobes short-triangular 

 or ovate. Style-branches with a short conic or otbuse appendage. Achenes hirsute, more 

 or less angled, somewhat compressed, cuneate-oblong. Pappus of 8-15 squamellae, each 

 dissected into 5-10 bristles. 



Type species, Tagetes papposa "Michx." [Vent.|. 



Annuals; ligules inconspicuous, hardly surpassing the disk. 



Involucral bracts usually greenish-yellow, with several conspicuous glands; 

 leaves decidedly glandular; leaf -segments not spine-tipped. 

 Calyculate bracts conspicuously long-ciliate, the hairs almost as long 



as the width of the bracts. I . B. ciliosa. 



Calyculate bracts inconspicuously and shortly ciliate below. 2. B. papposa. 



Involucral bracts usually tinged with rose, with only one or no glands; 



leaves indistinctly glandular; leaf-segments distinctly spine-tipped. 3. B. roseata. 



Perennials; ligules conspicuous, exserted, spreading. 



Peduncles thickened under involucres; calyculate bracts linear, acute. 4. B. tagetiflora. 



Peduncles not thickened; calyculate bracts oblong or oblanceolate, obtuse 

 or rounded at the apex. 

 Leaflets linear-oblanceolate, few-toothed towards the apex; plant 



green. 5. B. pinnata. 



Leaflets linear-filiform, mostly entire or with similar lobes; plant 



grayish. 6. B. subintegerrima. 



1. Boebera ciliosa Rydberg, sp. nov. 



A branched annual; stem 3-6 dm. high, pubescent with crisp hairs; leaves opposite. J 4 

 cm. long, usually crisp-hairy, twice pinnatind, with linear divisions; heads sessile; involucre 

 broadly turbinate or campanulate, 6 mm. high and fully as broad; principal bracts oval, 

 yellowish, usually acutish, usually with 2-5 conspicuous glands; accessory bracts linear, with 



2 or 3 glands, variable in length, from one half to two thirds as long as the involucre proper, 



strongly long-ciliate at the base; ray-flowers few, inconspicuous, or wanting; ligules oblong, 



nearly erect, scarcely 1 mm. long; disk-corollas 2.5 mm. long, similar to those of B. papposa; 



achenes 3 mm. long, compressed, pubescent; pappus brown, 2.5-3 mm. long. 



Type collected at Durango, in 1896, Palmer 920 (herb. N. Y. Bot. Gard.). 

 Distribution: Durango, Coahuila, and San Luis Potosi. 



2. Boebera papposa (Vent.) Rydb.; Britton, Man. 1012. 1901. 



Tageles papposa Vent. Descr. Cels pi. 36. 1801. 



Dyssodia glandulosa Cav. Descr. 202. 1802. 



Boebera chrysanthemoides Willd. Sp. PI. 3: 2125. 1804. 



Tageles pumila Willd. Sp. PI. 3: 2126, as synonym. 1804. 



Boebera glandulosa Pers. Syn. PI. 2: 459. 1807. 



Dyssodia chrysanthemoides Lag. Gen. & Sp. Nov. 29. 1816. 



Dyssodia papposa Hitchc. Trans. Acad. St. Louis 5: 503. 1891. 



A much-branched, ill-scented annual; stem 2-4 dm. high, sparingly pilose or glabrous, 

 striate; leaves mostly opposite, 2-5 cm. long, pinnatifid or bipinnatifid into linear divisions; 

 heads sessile or subsessile; involucre broadly campanulate, about 7 mm. high and 6-8 mm. 

 broad; principal bracts 7-10, elliptic, obtuse, with 3-9 conspicuous elliptic glands; accessory 

 bracts linear, two-thirds as long as the involucre, usually with 2 glands near the base; ray- 

 flowers few; ligules oval, inconspicuous, about 1.5 mm. long; disk-corollas 3 mm. long; tube 

 shorter than and hardly differentiated from the cylindric throat; lobes triangular; achenes 



3 mm. long, somewhat angled and compressed, pubescent; pappus 3 mm. long. 



Type locality: Illinois. 



Distribution: Illinois to Montana, Arizona, and Louisiana: adventive eastward. 



Illustrations: Vent. Descr. Cels pi. 36; Britt. & Brown, HI. VI. J. 3979; ed. 2. /. 4549. 



