330 Lxxiii. composite; (oliver and hiern). [Pluchea. 



6. P. heterophylla, Vatke in Oesterr. Bot. Zeitschr. 1875, p. 325. 

 A low shrub, but little branched, about 8 in. high, covered above as 

 well as the involucral bracts with stipitate glands, otherwise glabrous; 

 branchlets thin, leafy. Leaves obovate-oblong, fleshy ?, narrowed at 

 the base into the petiole, about 1^ by I in., in some cases quite entire 

 and rather obtuse, in other cases deeply i noise-dentate, with lobes and 

 apex acute, lepidote-punctate on both sides. Heads few, pedunculate, 

 subcorymbose. Involucral scales in many rows, narrow, recurved at 

 the apex ; the outer ones gradually shorter, rather obtuse ; the inner- 

 most ones acute ; common peduncle bracteate. Female florets in 

 many rows, numerous ; corolla tubular, filiform, bidentate at the 

 apex ; stigmas exserted. Male florets in the middle 'of the head, nu- 

 merous, exceeding the female ; corolla narrow^ly tubular, shortly 5-fid 

 at the apex. Style undivided, very slightly bilobed at the tip. Anthers 

 shortly caudate-acuminate at the base. Achenes appressedly setose. 

 Receptacle shortly foveolate. Setae of the pappus in one row, rather 

 scabrid. 



Wile Xiand. Somali country, among the Ahl Mountains, Hildebrandt! 

 The description is taken from Vatke, /. c. 



7. P. pinnatifida, Booh. fil. Ic. PI. 1. 1156. Shrubby, divaricately 

 branched. Branches pale brown, terete, glabrous below, glandular- 

 puberulous and leafy above, viscid at the extremities. Leaves deeply 

 pinnatifid, glandular- viscid, ^1 in. long by ^-f in. wide; lobes linear, 

 simple or occasionally toothed. Capitula campanulate, ^ in. wide, 

 many-flowered, solitary or subsolitary, on long rather thick stalks, 

 ■|-1 in, long, terminating the flow^ering branches. Scales of involucre 

 multiseriate ; outer linear-lanceolate, successively shorter ; inner 

 linear, glandular-puberulous, shortly ciliate, acute, mostly appressed. 

 Receptacle flat, -j\ in. diam,, naked. Achenes thinly and shortly 

 pilose, not compressed. Pappus of few (8-10) sordid setee. 



ZTile ]Land. Somali country, Capt. Plat/fair ! 



One of the sources of the drug Dagaboot or Gagahoot. See also note under Iphi- 

 ona rotundifolia. 



29. DENEKIA, Thunb. ; Benth. et Hook. f. Gen. PI. ii. p. 293. 



Capitula heterogamous, disciform, many-flowered ; outer florets 

 filiform $ , of the disk sterile. Involucre broadly campanulate ; scales 

 biseriate, subequal ; inner membranous ; outer herbaceous with mem- 

 branous margins. Receptacle plane, naked. Corolla of $ florets 

 filiform ; mouth 2-lobed ; lobes many times shorter than tube, ovate ; of 

 sterile florets tubalar-infundibuliform, 5-fid, with recurved or revolute 

 segments. Anthers shortly tailed, apex acuminate. Style-branches 

 ovate, obtuse. Achenes of $ florets very small, oblong, terete or sub- 

 terete, epappose ; of sterile florets slender, with pappus reduced to a 

 single (or 2) long filiform seta, pedicellate, plumose at apex. — Weak 

 annual or biennial herbs, usually branching from the crown. Leaves 

 alternate, oblong, amplexicaul, cottony below (or glabrate). Capitula 



