Ageratwm. | COMPOSITH. 271 
Shrubs. Female florets ligulate; lamina short, furnished 
at the base with 1 or 2 minute lobes. Achenes terete, 
papillose .. 3 Pe te .. 20. BRACHYGLOTTIS~- 
Herbs, shrubs, or trees. Female florets ligulate, never 
filiform .. ee ye Ag bc .. 21. SENECIO. 
SusporpDER LIGULIFLORAN. 
Florets all ligulate and hermaphrodite, and hence homogamous. 
Sap milky. Consists of one tribe, CicHORACER. 
Herb with radical leaves. Scapes simple, leafless. Pappus 
of tapering subulate scales, toothed or plumose above .. 22. MIcROSERIS. 
Branched leafy herb. Achene ribbed and transversely 
rugose. Pappus soft, plumose . 23. PICRIS: 
Herb with radical leaves (the New Zealand species). 
Achene terete, ribbed. Pappus of simple capillary 
bristles... oH & a x .. 24, CREPIS. 
Herbs with radical leaves. Scapes simple, leafless. 
Achenes long - beaked. ee of simple capillary 
bristles .. 25. TARAXACUM. 
Tall leafy succulent ‘herbs. Achene flat, not beaked. 
Pappus of simple capillary bristles .. . 26. SoncHUS. 
1. AGERATUM, Linn. 
Erect herbs or rarely shrubs. Leaves opposite or the upper 
alternate. Heads usually corymbose, homogamous and discoid. 
Involucre campanulate; bracts 2—3-seriate, linear, subequal. Re- 
ceptacle flat or nearly so, naked or with deciduous scales among 
the florets. Florets all tubular, hermaphrodite, equal; corolla-limb 
regularly 5-cleft. Anthers obtuse at the base. Style-branches 
elongate, obtuse. Achenes 5-angled. Pappus of 5 free or connate 
scales, or of 10-20 narrower ones. 
A small genus of about 18 species, confined to America with the exception 
of the following one, which is universally spread through all warm regions. 
1. A. conyzoides, Linn. Sp. Plant. 839.—A stout erect branch- 
ing annual herb 1-3 ft. high, more or less clothed with spreading 
hairs. Leaves opposite, 1-3 in. long, +-2in. broad, ovate, obtuse or 
subacute, petiolate, crenate or crenate-serrate. Flower-heads small, 
tin. diam., in dense terminal corymbs. Involucre nearly glabrous ; 
bracts striate, acute, in about 2 rows. Florets numerous, blue or 
white. Achenes black, glabrous or slightly hispid. Pappus of 
5 awned lanceolate scales.—D.C. Prodr. v. 108; Benth. Fil. 
Austral. ii. 462; Cheesem. Trans. N.Z. Inst. xx. (1888) 169; Kirk, 
Students’ Fil. 256. 
KrRMADEC Istanps: Abundant, 7. F. C., Miss Shakespear! Wild. 
Heliotrope. 
2, LAGENOPHORA, Cass. 
Small perennial herbs. Leaves often all radical. Scapes 
slender, unbranched. Heads solitary, small, heterogamous. Invo- 
luere short, almost hemispherical; bracts in about two rows, with 
