270 SCROPHULARINE^. 



* # * * -x- Corolla strongly bilabiate; upper Up concave or galeaie. 



Calyx and corolla laterally compressed; 



Capsule not rostrate CASTILLEIA 17 



Capsule falcate or rostrate PEDICULARIS 21 



Calyx 4-cleft; lower lip of corolla 3-saccate OBTHOCARPUS 18 



Calyx spathaceous, or diphyllous ADENOSTEGIA 19 



Calyx campanulate, 4-cleft, the segments toothed BELLARDIA 20 



1. YERBASCUM, Pliny (MULLEIN). Coarse biennials, the cauline 

 leaves sessile, often decurreut; the spicate or racemose flowers ephem- 

 eral. Calyx 5-parted. Corolla nearly rotate. Htiimens 5; anthers by 

 confluence 1-celled; superior filaments woolly-bearded. Capsule 2-valved, 

 oo - seeded. Seeds rugose. Our two species naturalized from Europe. 



1. V. THAPSUS, L. Densely woolly throughout: stem simple, 36 ft. 

 high, winged by the decurrent bases of the oblong entire crowded leaves : 

 fl. yellow, in a dense spike a foot long or more, and 1 2 in. thick. 

 Upper part of Napa Valley, and elsewhere in mountainous districts. 



2. V. VIRGATUM, Withering. Green, but somewhat pubescent and gland- 

 ular, rather slender, 36 ft. high: leaves oblong, obtuse, crenate or 

 sinuate, not decurrent: fl. yellow, in a long loose raceme; pedicels often 

 in twos and threes and not longer than the calyx-lobes. Not rare in 

 fields and on roadsides. 



2. LIN ARIA, Brunfels. Inflorescence simple, racemose. Corolla 

 personate, spurred at base. Capsule many-seeded, opening by irregular 

 perforations. 



1. L. Canadensis (L.), Dumont. Glabrous annual, leafy chiefly as 

 to the procumbent shoots at base of main stem, and the leaves of these 

 opposite or whorled, oblong, 12 lines wide: stem 630 in. high, nearly 

 naked, racemose at summit: pedicels erect, not longer than the filiform 

 curved spur of the blue corolla. Sandy soils. 



3. ANTIRRHINUM, Diosc. Ours either glabrous, or glandular and 

 oily-viscid herbs, with axillary or terminal and spicate-racemose flowers, 

 their structure like those of Linaria, except that the corolla has a 

 sac-like gibbosity or protuberance at base instead of a spur. 



* Stout perennials, with spicate-racemose flowers. 



1. A. virga, Gray. Glabrous; stems strict and simple, 35 ft. high: 

 leaves linear, diminishing under the long spike-like raceme to subulate 

 or setaceous bracts: purple flowers mostly secund,'% in. long: longer 

 filaments with tips dilated to more than the width of the anthers. 

 Sonoma Co. and northward, among the higher hills. May, June. 



2. A. giandnlosum, Lindl. Size of the last, but more branching, 

 very glandular-pubescent a nd viscid throughout : leaves lanceolate: corolla 

 % in. long, purplish, with yellow palate: capsule tipped with long and 

 persistent style. Mt. Hamilton and southward. June, July. 



