COMPOSITA. 269 
ordinal characters given in this book, or in other works on the flora. By so 
doing he will insensibly acquire a practical knowledge of the characters used in 
distinguishing the species and genera which will ultimately enable him to 
identify them for himself. In using the subjoined key to the New Zealand 
genera it must be remembered that the minute differences in the shape of the 
style-branches, so largely employed to separate the tribes from one another, can 
only be observed in the hermaphrodite florets, the style of the female florets 
being very similar throughout the order. 
SuBORDER TUBULIFLORA. 
Heads with the florets all tubular and hermaphrodite, or with 
the marginal ones alone ligulate and female or neuter. 
TrisE 1. HUPATORIACE A. 
Heads homogamous, florets all tubular, hermaphrodite. Anthers obtuse at 
the base. Style-branches long, obtuse, thickened upwards or club-shaped, 
equally minutely papillose. 
Herb with opposite leaves. Achene 5-angled. Pappus of 
5-10 seales or bristles rs A ac .. 1, AGERATUM. 
Tripg 2, ASTHEROIDEA. 
Heads heterogamous, radiate or discoid, or with the ray deficient and then 
homogamous. Anthers nearly entire at the base. Receptacle naked. Style- 
branches flattened, produced above the stigmatic margins into a triangular or 
lanceolate papillose appendage. 
A. Female florets ligulate, forming a more or less conspicuous ray. (Ray absent 
in some species of Olearia, and dwarfed in two species of Pleurophyllum.) 
* Pappus wanting, or of minute scales or sete. 
Herbs. Leaves usually radical. Pappusentirely wanting. 
Achene narrowed upwards into a neck or beak 2. LAGENOPHORA. 
Herbs. Leaves radical or cauline. Pappus wanting or of 
scale-like bristles. Achene not beaked ays .. 3. BRACHYCOME. 
** Pappus long, copious. 
Shrubs or trees. Scales of the involucre in several series, 
margins scarious. Achenes nearly terete He .. 4, OLEARIA. 
Herbs. Leaves all radical, large, many-nerved. Heads 
numerous, racemed : .. 5. PLEURO- 
Usually stemless herbs with radical ‘leaves, ‘but stems PHYLLUM. 
sometimes elongated and the leaves cauline. Scapes 
simple; heads solitary a .. 6, CELMISIA. 
Branched leafy herb. Heads solitary, terminal. Achene 
much flattened. Style-branches with subulate tips .. 7. VITTADINIA. 
B. Female florets tubular, in many series. 
Alpine woolly herbs. Stems czspitose or compacted into 
hard rounded masses. Heads broad, sessile .. oo) ee LLAASIITA. 
TRIBE 3. INULOIDEA. 
Heads heterogamous and discoid (rarely radiate in some foreign genera), or 
homogamous through the suppression of the female florets. Anther-cells pro- 
duced at the base into filiform tails. Style-branches linear, obtuse, never 
ending in an appendage. 
