298 COMPOSITE. ^Hofmeisteria. 



* * * Pappus of copious capillary and merely scabrous or at most minutely barbellate bristles. 

 Receptacle naked, or in No. 115 and 116 with some delicate bristles between the flowers. 



-H Akenes not flattened : pappus white, mostly bright white, 

 H- All or most of it early deciduous or caducous more or less in a ring. 



114. Glyptopleura. Akenes 4-5-angled and with a sculptured surface, abruptly short-beaked 



from a cup-shaped shoulder, and the beak cup-shaped at apex or hollow. Receptacle 

 naked. 



115. Calycoseris. Akenes tapering into a slender beak, the apex of which is dilated into a 



scarious crown or shallow cup. Receptacle with delicate Ijristles between the flowers. 



116. Malacothrix. Akenes columnar, truncate at both ends, 10-15-ribbed ; the broad apex 



with a prominent crown-like margin or sharp edge, either entire or denticulate, some- 

 times bearing a more persistent outer pappus of 1 to 8 stronger bristles. 



H- ++ Pappus more persistent, simple, the bristles separately if at all deciduous from the akene : 



flowers mostly yellow. 



117. Crepis. Scales of the involucre commonly carinate-thickened at base or with firmer 



midrib when old. Akenes 10-20-ribbed, smooth, more or less tapering at the apex, 

 not long-beaked. 



118. Troximon. Scales of the involucre unaltered in age. Akenes 10-ribbed, not muricate- 



roughened, above contracted into a neck or beak. 



119. Taraxacum. Scales of the involucre unaltered in age. Akenes 4 -10-ribbed or angled, 



the ribs becoming muricate, the apex developed into a long filiform beak. 



+- -f- Akenes not flattened nor beaked : pappus tawny or dirty white, mostly fragile. 



120. Apargidium. Head many-flowered on a simple scape. Flowers yellow. Akenes short, 



not ribbed : bristles of the pappus barbellate-denticulate. 



121. Hieracium. Heads many-flowered. Flowers yellow. Akenes short, 5 -10-ribbed: bris- 



tles of the pappus scabrous. 



122. Lygodesmia. Heads 5-10-flowered. Flowers rose-color or pink. Akenes narrow or 



slender : bristles of the pappus copious, scabrous. 



+- +- + Akenes flat : pappus almost always bright white, fine and soft. 



123. Lactuca. Involucre not tumid at base. Akenes with a beak or neck under the dilated 



disk that bears the pappus, the bristles of which fall separately. 



124. Sonchus. Involucre becoming tumid or fleshy-enlarged at base. Akenes destitute of 



beak or neck, and having no dilated pappus-bearing disk ; bristles of the pappus decidu- 

 ous more or less in connection. 



CRYPTOSTEMMA CALENDULACEA, R. Br. , of, the tribe Arctotidece, a native of S. Africa, but 

 naturalized in Australia, has been gathered by Mr. E. L. Greene near the landing at South Val- 

 lejo ; probably a ballast weed, and we may hope transient. It is a stemless plant, with leaves 

 resembling those of Dandelion, but white-tomentose, at least beneath, the solitary heads on slen- 

 der scapes, and the ray-akenes enveloped in verv long wool. It is not worth while to introduce 

 another tribe into the series for this waif. 



(TRIBE I. VERNONIACE.E, wanting.) 



TRIBE II. EUPATOEIACE^E. 



Heads all homogamous and discoid ; the flowers perfect, with regular tubular 

 corollas, never truly yellow. Anthers obtuse at base. Branches of the style obtuse, 

 inclined to club-shaped, minutely papillose-roughened or almost smooth, destitute 

 of any appendage ; the stigmatic lines indistinct. 



1. HOPMEISTERIA, Walpers. 



Head many-flowered. Involucre of imbricated narrow acuminate scales, the 

 exterior successively shorter. Receptacle flat, naked. Corollas slender, 5-toothed. 

 Branches of the style club-shaped. Akenes 4 - 5-angled. Pappus of 2 to 12 slen- 

 der bristles alternating with as many chaffy scales. Low plants, suffruticose at 

 base and branching, nearly glabrous, with long-petioled incised or lobed leaves, the 



