20 Addisonia 



leaves are paired and ultimately distant, the lower ones with long 

 hairy petioles, the upper with short petioles. The blades are typi- 

 cally elliptic, oval, or ovate, entire or with a pair of small basal lobes. 

 The heads are long-peduncled and showy. The bracts of the 

 involucre are various; the outer are linear, linear-oblong, or linear- 

 lanceolate, the inner are ovate-lanceolate to ovate. The bractlets 

 on the receptacle are narrow, but wider and thinner at the base than 

 at the apex. The ligules are yellow, cuneate, spreading, three- 

 lobed near the tip, with the middle lobe notched. The disk-flowers 

 are more numerous than those of the ray, with the tube of the 

 corolla and the throat about equal in length. The corolla lobes are 

 deltoid or deltoid-ovate, much shorter than the throat. The achene 

 is oval or obovoid, with the incurved margins bordered by narrow 

 slightly involute thin pale wings. 



John K. Small. 



Explanation of Plate. Fig. I. — Top of flowering stem. Fig. 2. — Bractlet 

 of the receptacle, X 3. Fig. 3. — Disk-flower, X 3. Fig. 4. — Achene, X 5. Fig. 

 5. — Lower leaf. 



