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Tribe 5. Helianthoidije, — Flower-heads heterogamous, radiate, 

 or disciformis, or wanting rays and homogamous. Receptacle 

 paleaceous, or rarely naked in the centre. Anthers ecaudate, or with 

 two very short points at the base. Style-branches with the apex 

 truncate or appendiculate, or style of the sterile flowers entire. 

 Achenes 3-4-angled, or terete, or compressed. Pappus of 2-4 bristles, 

 or paleaceous, or none. 



Snbtrihe Amhrosiete. — Heads heterogamous or unisexual. Flowers 

 hermaphrodite, sterile, with undivided styles ; female apetalous. 

 Anthers nearly free, with inflexed appendages. Examples : Ambrosia, 

 XantMum. Both genera introduced weeds; the latter includes the 

 Bathurst and Noogoora burrs. 



Subtribe Zinniea. — Head radiate ; ligula of achene sessile or sub- 

 . sessile, persistent. Receptacle paleaceous. Example: Zinnia, a 

 well-known garden annual. 



Subtribe Verbesinece. — Heads hetero or homogamous. Flowers 

 hermaphrodite, all fertile. Achenes of the disk anguled, subterete, or 

 laterally compressed, crowned with 2-3 bristles or scales or naked. 

 Leaves usually opposite. Examples : Siegesbeckia, Eclipta, Selianihus, 

 or Sunflower. 



Subtribe Goreopsidem. — Heads hetero or homogamous. Flowers 

 hermaphrodite, all fertile ot neuter. Achenes dorsally compressed. 

 2-4 awned or naked. Examples : Coreopsis, Dahlia, Cosmos, all well- 

 known garden plants. 



Subtribe Galinsoffece. — Heads hetero or homogamous. Flowers 

 hermaphrodite, all fertile. Achenes with short bristle-like palese. 

 Example : Qalinsoga, an introduced aaid troublesome annual weed, at 

 once recognized by its 5 (usually), small white ligulate florets. 



Tribe 6. HeIenioide^.— Flower-heads heterogamous radiate, or 

 rarely disciformis or wanting rays and homogamous. Receptacle 

 naked. Anthers without tails. Styles of the hermaphrodite flowers 

 with the branches truncate or appendiculate. Achenes narrow or 

 turbinate, .4-5 angled or with 8 or many ribs, and crowned with paleas, 

 rarely awns or setse, rarely bald. Leaves opposite or alternate. 

 Involucre bracts 1-2 seriate or rarely 3-4 seriate, herbaceous or mem- 

 branous. Corolla-disk usually yellow, rays of the same colour or 

 various. 



Subtribe Tagetinem. — Involucral bracts 1-seriate, equal, sprinkled 

 with oil-glands. Achenes narrow and much striated. Pappus 

 paleaceous, aristose, setose or rarely none. Example : Tagetes ; one 

 species known as the French Marigold. 



Subtribe Huheleniees. — Involucre often with broad bracts, of 2 or 

 few series, subequal or imbricate. Achenes turbinate or oblong, silky 

 villose. Example : Qaillardia, a showy genus often cultivated for the 

 sake of its flowers. 



Tribe 7.. Anthemibe^. — Flower-heads heterogamous radiate or 

 disciformis, or wanting rays and homogamous. Involucral bracts 2 or 

 many seriate, dry or scarious at the tips. Keceptacle paleaceous or 

 naked. Anthers without tails. Style-branches truncate at the apex. 

 Pappus none or a crown of short paleaj. Leaves most frequently 

 alternate. Disk-flowers yellow, ray-flowers variously coloured. 

 Examples : Chrysanthemum, Centipeda, Tanacetum. The first genus is 

 well known ; the second is composed of weedy plants which have some 

 medicinal reputation ; the latter contains the well-known Tansy. 



