1. Buchnera americana L. 



Plant rough-hairy, the virgate stem to about 8 dm. high; lower leaves lanceo- 

 late to obovate-oblong, to 1 dm. long, the others ovate-oblong to linear-lanceolate, 

 sparingly and coarsely toothed, scabrous, veiny; spike interrupted; calyx pubes- 

 cent, 6-7 mm. long, exceeding the bracts; corolla deep-purple, the tube about 

 1 cm. long, the lobes 5-8 mm. long; capsule ovoid-oblong, about 7 mm. long. 



In moist sandy soil of open woods, prairies, meadows and marshy areas in 

 e. Okla. (Waterfall) and e. Tex., June-Dec; from Fla. to Tex., n. to N.J., N.Y., 

 Ont., Mich., 111., Mo. and Kan. 



2. Buchnera floridana Gand. 



Stem to about 6 dm. high, slightly pilose to glabrate above, commonly from 

 thickened roots; leaves rough-pubescent, the larger one elliptic-oblanceolate and 

 to 1 dm. long and 18 mm. wide; bracts 2-3 mm. long, spreading; calyx lobes 

 triangular, acute, to 1 mm. long, the anterior sinus the deeper; corolla violet to 

 purplish or rarely white, the tube 7-8 mm. long, the triangular-obovate lobes 3-5 

 mm. long; capsule about 5 mm. long. B. breviflora Penn. 



In sandy or gravelly soils, bogs and coastal savannahs, throughout most of 

 the s. half of Tex., Apr.-Nov.; from Fla. to Tex., n. to N. C. 



18. Parentucellia Viv. 

 Four species native to Eurasia. 



1. Parentucellia viscosa (L.) Camel. Fig. 703. 



Erect glandular-pubescent annual, to about 5 dm. tall; stem simple or branched 

 above the middle; leaves opposite to subopposite or spirally arranged, 3-5 cm. 

 long, ovate-lanceolate to triangular-lanceolate, acute, sessile and clasping at the 

 rounded base, saliently toothed, pubescent except between ribs on lower leaf 

 surface; flowers essentially sessile in spicate racemes terminating the main stem 

 and branches; bracteoles none; calyx with 4 lanceolate lobes; corolla golden- 

 yellow, 15-17 mm. long, 2-lipped with the upper lip galeate; capsule about 8 mm. 

 long, distally brown-hirsute; seeds 0.3 mm. long. 



In moist to wet sandy soil and grassy-seepy areas along streams, in s.e. Tex. 

 (Jasper Co.), Apr.-June; an Old World species introd. in n. Calif., Ore. and Tex. 



19. Pedicularis L. Lousewort. Wood-betony 



Erect perennial herbs with (in ours) alternate leaves and a usually spikelike 

 raceme of yellow, purple, red or white flowers; bracteoles none; calyx with 5, 4, 

 or seemingly 2 lobes; corolla bilabiate, its upper lip galeate and often extended 

 into a beaklike process, its lower lip shorter and with the oblique lobes spreading 

 or appressed; stamens 4, didynamous; anthers glabrous, their cells equivalent, 

 obtuse to subulate-tipped; capsule flattened, glabrous, loculicidal; seeds several, 

 turgid, often slightly winged. 



About 500 species in the Northern Hemisphere. 



1. Distribution in eastern Oklahoma and eastern Texas 1. P. canadensis. 



1. Distribution New Mexico and Arizona (2) 



2(1). Corolla bright-pink to red-purple; galea prolonged into a filiform beak that 

 is curved outward and upward and is as long as the remainder of 

 the corolla 2. P. groenlandica. 



2. Corolla yellow-white or sordid-yellow; galea not prolonged into a slender 



beak, much shorter than the rest of the corolla (3) 



3(2). Corolla 1-2 cm. long, yellowish-white; galea falcate, the short stout beak 

 conic and straight or slightly incurved 3. P. Parryi. 



1499 



