832 MISC. PUBLICATION 42 3, IT. S. DEPT. OF AGRICULTURE 



The Arizona form is var. palmeri Gray, distinguished from the typical 

 form of the species by having the tip of the lower lip purple like the 

 rest of the corolla, and often with 1 or more deeper colored spots, 

 instead of yellow or white. 



2. Orthocarpus luteus Nutt., Gen. PL 2: 57. 1818. 



Apache County to Coconino County, on both sides of the Grand 

 Canyon, 7,000 to 9,000 feet, mostly in yellow -pine forests, August and 

 September. Canada to Nebraska, New Mexico, Arizona, and 

 Nevada. 



3. Orthocarpus purpureo-albus A. Gray in King, Geol. Expl. 40th 



Par. 5: 458. 1871. 

 Navajo, Coconino, and Gila Counties, 5,500 to 9,000 feet, coniferous 

 forests, July to September. Colorado to Idaho, New Mexico, and 

 Arizona. 



23. RHINANTHUS. Yellow-rattle 



Plant annual, possibly a root parasite; stems strictly erect, leafy, 

 4-angled; leaves opposite, sessile, thickish, rigid, scabrous, lanceolate, 

 sharply serrate; flowers in a rather dense, leafy-bracted, spikelike 

 raceme; corolla yellow, bilabiate, the upper lip arched, the lower lip 

 3-lobed; anthers hairy; capsule compressed, orbicular; seeds winged. 



The plants have been used as an insecticide. 



1. Rhinanthus rigidus Chabert, Herb. Boissier Bui. 7: 516. 1899. 



White Mountains, Apache County, at Greer (Eggleston 17083) and 

 onBaldy Peak (Peebles and Smith 12493), 8,800 to 9,600 feet, August, 

 Canada and Alaska to Colorado, eastern Arizona, and Washington. 



24. PEDICULARIS. Woodbetony 



Plants partially root-parasitic, perennial, herbaceous, caulescent or 

 subacaulescent ; leaves alternate or basal, toothed to bipinnatifid; 

 flowers in bracted spikes ; corolla strongly bilabiate, narrow, the upper 

 lip compressed on the sides, arched and often beaked at the apex, the 

 lower lip 3-lobed, the middle lobe smaller; capsule oblique, com- 

 pressed. 



Some of the species are known also as duckbill and fernleaf. 



Key to the species 



1. Galea prolonged into a filiform, recurved beak (curved outward and upward), 

 this as long as or longer than the rest of the corolla; herbage glabrous; 

 stems strictly erect, moderately leafy; leaf blades deeply and incisely 

 pinnatifid or bipinnatifid; inflorescence spiciform, cylindric, many-flowered; 



corolla bright pink to claret red 1. P. groenlandica. 



1. Galea not beaked or, if so, then the beak straight or incurved (curved down- 

 ward) , much shorter than the rest of the corolla (2) . 

 2. Leaf blades merely crenate or crenate-dentate, often doubly so, linear or 

 linear-lanceolate; beak of the galea strongly incurved, 4 to 5 mm. long; 

 lower lip of the corolla nearly equaling the galea; stems commonly 30 

 cm. long or longer, very leafy; herbage glabrous or sparsely pubescent; 

 flowers few, in loose, leafy racemes; corolla 12 to 20 mm. long, white. 



2. P. RACEMOSA. 



2. Leaf blades pinnatifid or bipinnatifid (3). 



3. Galea falcate, the beak short, stout, conic, straight or slightly incurved; 

 corolla 10 to 15 mm. long, ochroleucous; stems stout, strict, moder- 

 ately leafy, up to 50 cm. long; leaf blades bipinnatifid, with numerous 

 narrow divisions; racemes elongate-spiciform, usually dense, with 

 numerous or many flowers _ _ 3. P. parryi. 



