158 Flora of t/ic Palousc Region 



Anther-cells dehiscent for their whole length or nearly so. 



Anthers woolly. P. CRASSIFOUUS. 



Anthers not woolly: sterile filaments beardless. P. DEUSTUS. 



Anthers not woolly: sterile filaments bearded. 



Leaves serrate or denticulate. P. OVATUS. 



Leaves entire: flowers 8-12 mm. long. P. confertus. 



Leaves entire: flowers 16-18 mm. long. P. attenuates. 



Anther-cells dehiscent only at the apex, the base sac-like. 



Glandular: flowers large, 2-3 cm. long. P. gi_andul,OSUS. 



Glabrous: flowers small. P. triphyelus. 



P. crassifolius Lindl. (P. douglasii Hook.) Stems simple, ascending 

 from a branched woody base, 15-40 cm. high: leaves coriaceous, glabrous, 

 lanceolate, oblanceolate or ovate, mostly acute, entire or with a few teeth, 

 narrow at base, the lower short-petioled, 1-4 cm. long: inflorescence a 

 raceme, rarely a panicle, 2-11-flowered, viscid-pubescent: bracts much re- 

 duced: sepals ovate-lanceolate, attenuate-acuminate, 8-12 mm. long: corolla 

 tubular- funnelform, dull-purple, somewhat 2-lipped, 3-4 cm. long: anthers 

 very woolly, dehiscing their whole length; sterile filament bearded. In 

 rock crevices, Cedar Mountain. 



P. deustUS Dougl. Wholly glabrous below the inflorescence: stems leaf}-, 

 erect, tufted, 20-40 cm. high, from a woody base: lowest leaves oblanceolate, 

 petioled, the cauline lanceolate, acute, irregularly dentate, sessile by broad 

 bases, 2-5 cm. long: panicle narrow, leaf}' below, 8-20 cm. long: peduncles 

 mostly short, several-many-flowered: sepals lanceolate-ovate, acuminate, 

 slightly margined, sparsely glandular: corolla white or yellowish, minutely 

 viscid-glandular, 1-1.5 cm. long, narrowly funnelform, 2-lipped: anthers de- 

 hiscing their whole length; sterile filament naked. Rock}' places in Snake 

 River canyon. 



P. OVatus var. pinetorum Piper, n. var. Tall, 60-100 cm. high, with sev- 

 eral stems from horizontal rootstocks: steins usually glabrous or nearly so: 

 radical leaves ovate or elliptic, mostly entire, acute, glabrous, thickish and 

 evergreen; the blades 1-7 cm. long, attenuate into a petiole as long or longer; 

 cauline leaves 3-5 pairs, the lower pairs oblong or broadly spatulate, the up- 

 per decidedly ovate, all sessile, obtuse or acute, more or less dentate: inflor- 

 escence a more or less glandular-viscid, panicle of 4-8 whorled clusters: 

 calyx-lobes ovate, acuminate, usually decidedly glandular: corolla bright 

 blue, varying to pink and pale yellow. 



This extremely ambiguous plant is exactly intermediate between P. ovatus 

 Dougl. and P. attenuatus Dougl. From the former it differs in its taller habit, 

 entire radical leaves, glabrous stems, and glandular calyx-lobes. From the 

 latter it differs only in leaf characters. Besides being referred to the above 

 two species, the plant has been called P. confertus Dougl. and P. procerus 

 Dougl. and it forms the bulk of P. pruinosus of the Synoptical Flora. As a 

 matter of fact, the plant here described mightjustly be considered as proving 

 all the above named plants mere varieties of one polymorphous species. 

 The type is Piper No. 1662 from Cedar Mountain. 



P. confertus Dougl. Glabrous throughout: stems erect, commonly 30-40 

 cm. high: leaves all entire; radical oblong, lanceolate or oblanceolate, acute 

 or obtuse, 3-6 cm. long, attenuate at base into a petiole; cauline similar, ses- 

 sile, the upper often ovate, acuminate: panicle strict, narrow, leafy below, 

 14-40 cm. long, of 2-8 whorl-like clusters: sepals glabrous, the scarious mar- 



