FLOWERING PLANTS AND FERNS OF ARIZONA 66 1 



corymbose or umbelliform, the flowers nodding; petals pink or whitish, 

 waxlike, spreading. 



Key to the species 



1. Leaf blades lanceolate or ovate, whitish-mottled along the veins; dilated 

 portion of the filaments conspicuously villous 1. C. maculata. 



1. Leaf blades oblanceolate or spatulate, not mottled; dilated portion of the 

 filaments glabrous or merely ciliolate 2. C. umbellata. 



1. Chimaphila maculata (L.) Pursh, Fl. Amer. Sept, 300. 1814. 



Pyrola maculata L., Sp. PL 396. 1753. 



Santa Catalina Mountains (Pima County), about 8,000 feet, among 

 rocks in pine forest (Harrison and Kearney 8100), August. Massa- 

 chusetts and Ontario, south to Georgia, Arizona, and Mexico. 



Represented in Arizona by var. dasystemma (Torr.) Kearney and 

 Peebles (C. dasystemma Torr.), which differs from most of the eastern 

 specimens of C. maculata in its shorter and broader leaf blades, these 

 2 to 4 cm. long, one-third to two-thirds as wide as long. 



2. Chimaphila umbellata (L.) Nutt., Gen. PL 1: 274. 1818. 



Pyrola umbellata L., Sp. PL 396. 1753. 



Coconino County, Baldy Peak (Apache County), Pinaleno Moun- 

 tains (Graham County), 6,500 feet or higher, coniferous forest, July. 

 Widely distributed in the Northern Hemisphere. 



Represented in Arizona by var. acuta (Rydb.) Blake (C. acuta 

 Rydb.), which may be distinguished from other forms of C. umbellata 

 by its narrowly oblanceolate, acute or acutish, few-toothed leaves, 

 not prominently veined beneath. The type of C. acuta Rydb. was 

 collected on the Mogollon Escarpment, head of Tonto Basin (Mearns 

 136). 



4. PYROLA 



Small herbaceous perennials, more or less scapose; leaves mostly 

 basal or nearly so, evergreen, usually with well-developed blades; 

 flowers several, nodding, in terminal racemes; corolla nearly globose; 

 anthers commonly reversed at anthesis, the basal pore appearing 

 apical. 



Key to the species 



1. Stamens connivent; style straight, the stigma much wider than the apex of 

 the style, the latter not expanded into a ring or collar; plants with well- 

 developed green leaves; leaf blades oblong-ovate, serrulate; racemes 

 secund; corolla campanulate, with connivent, greenish-white petals; 



anthers not beaked; style 3 to 4 mm. long 1. P. secunda. 



1. Stamens not connivent, often declined; style bent at base, more or less curved 



upward toward the apex; stigma narrower than the apex of the style, the 



latter expanded into a ring or collar (2). 



2. Basal leaves, when present, with greatly reduced blades not more than 



5 mm. wide; plant almost or quite devoid of chlorophyll; petals greenish 



brown outside 2. P. aphylla. 



2. Basal leaves with well-developed green blades at least 1 cm. wide; petals 



greenish white (3) . 



3. Leaf blades more or less whitish-mottled along the veins, ovate or oval, 



thick, 3 to 8 cm. long, usually longer than the petiole, denticulate to 



nearly entire; anther cells narrowed or beaklike at the apparent apex. 



3. P. PICTA. 



