BACCHARIS— BAHIA 261 



(n) Stems and peduncles hairy, or 

 at least with hairy lines 

 r. Lower leaves ovate and heart- 

 shaped, long-petioled ; rays 

 blue to violet A. litulleyanus 



s. Leaves lanceolate, spatulate to 

 linear 

 (r) Lower leaves spatulate or 

 oblong-spatulate ; heads 

 mostly few-several, in 

 flat-topped clusters A. adscendens 



(s) Leaves lanceolate to linear 

 h. Bracts of 1-2 different 

 lengths ; rays violet to 

 purple A.longifolius 



i. Bracts of 3-5 different 



lengths ; rays often white A. salicifolius 



Baccharis Linne 1753 

 (Named for Bacchus) 

 Heads without rays, dioecious, achenes ribbed, somewhat flattened, 

 pappus of hair-like bristles, shorter in the staminate flowers ; receptacle 

 fiat without chaff, involucre bell-shaped, the bracts imbricated in several 

 rows ; heads in panicles or corymbs ; leaves alternate, simple ; herbs or 

 shrubs. 



1. Stems herbaceous, except for a woody base 



a. Leaves linear, entire ; pappus elongating in 



fruit, 4 times as long as the 8-10-ribbed 



achene B. Wrightii 



b. Leaves long-lanceolate, somewhat toothed ; 



pappus little elongated in fruit ; achene 5- 

 ribbed B. ghitinosa 



2. Shrubs, 3-10 ft. high 



a. Pistillate heads 5-10 mm. broad; involucral 



bracts all acute 



b. Pistillate heads 3-5 mm. broad ; outer bracts 



obtuse B. Emory i 



(Named for Bahi, a Spanish botanist) 



Baiiia Lagasca 1816 Baitia 



PI. 41, fig. 1. 



Heads with yellow pistillate ray-flowers or none, disk-flowers perfect. 



yellow, achenes linear to oblong, 4-angled, pappus of several papery scales ; 



