APPENDIX. 
453 
19. P. CENTKAMjiiiouus, Bentii. Sepals broad-ovate; corolla erhusoii, tubular, scarcely dilated, 
with a short equal limb ; sterile filament glabrous. See page 219. 
20. P. PUNICEUS, Gray. Cymelets rather deuse ; sepals ovate or obloug ; corolla bright scarlet, 1 ' 
long or less, tubular, the throat slightly dilated, lobes broad, rounded, subequal; sterile lilauieut bearded 
at top. — Arizona and Sonora. 
21. P. Wbigiitii, Hook. Pariiclo loosely virgate, cymelets few-liowered ; sepals obloni;, ili,' iii>s 
spreading; corolla less than V long, bright rose-red, ventricose above, with broad rounded wide-spread 
lobes; sterile filament densely long-l)earded.— W. Texas, Arizona. 
* * Glabrous, sTibglaucous, tall ; leaves croVded, oblong or ovate-lanceolate, coriaceous, the upper 
connate; panicle loose, elongated, c.ymoiets .Vg-flowered and j.rduucled; corolla 1' long, blue-pur- 
ple, inflated above, bilabiate with very broad and spreading lobes ; sfci'ilc lilauK'nt glal)rous. 
22. P. SPECTABiLis, Thurb. W. Texas to California. 
* * ■* Glabrous or nearly so; leaves pinnately parted witli riarrou -lint ar si giiKMits : pauicif loose ; 
corolla purple, not 1' long, dilated above, lobes subequal ; sterile filamc-nt iM-ardcd at 
23. P. DISSECTUS, Ell. Georgia. 
* * * * Glabrous or pruinose- or viscid-puberulent ; leaves filirorni-subiilatt', linear or lincar-spatu- 
late, entire; flowers in a simple raceme or loose virgate panicle. 
(a.) Inflorescence strictly racemose ; corollai scarn ly bihibiale. 
(1.) Leaves almost filifoi in. glabrous. 
24. P. LAKICIKOLIUS, H. & A. 6' higl), casspitose'; leaves erowiled at base; ihiweiiiig slems slender, 
eimjile; raceme 4-8-flowered; corolla long, purple, tube dilated nliovo; sterile filament bi'.irded.— 
S. Idaho. 
25. P. AMBIGUUS, Torr. 1-2^" high, woods at base, )>anieulately braiielieil : lnwer lea ves linear, nar- 
rowed at base; racemes loose; corolla 5-8" long, ])ur]plisli-\vliite, tlie liml) broad and spreadiiii;. the tube 
but little dilated and bearded in the throat ; sterile lilanient glabrous, at times aiitlierit't ioii.-.- ( olurado 
to New Mexico and Arizona. 
(2.) Leaves liuear-lanceolate or linear-spatulatC; puberulcnt or pruinose jmljesei nt ; stems woody at 
base. 
26. P. GAijRDXERi, Hook. Much branched at base, a span high ; pedicels short, somewhat opposite ; 
sepals glandular-viscid; corolla |' long; sterile lilauieut beardt d.— AVasliington Territory. 
27. P. DASVPHYixus, Gray. Stem snbsimple ; raceme loosi ly I'ew -llow ered, the pedicels alternate ; 
corolla purplish-blue, nearly IJ' long; sterile filameut glabrous.— Arizona and New Mexico. 
(&.) Peduncles mostly 2-5-flowered, forming a racemose or \ irgate panicle ; sepals ovate ; stems erect, 
usually simple. 
(1.) Stems 2-3° high ; peduncles opposite, elongated, 2-5-flowered, in a I'atliei' loose panicle ; corolla 
blue, (or purple,) 1^' long, dilated above. 
28. P. STENOPiiYLLUS, Gray. GhTbrous ; leaves linear, the lower ones H-l' long: sterile ti);imeiit 
glabrous. — Mexico, Arizona. 
(2.) Stems |-H° high, usually very minutely pruinose-puberuleut ; p(duneies and jMdieels short; 
corolla purple, short-bilabiate, over i' long, much dilated above. 
29. p. VIRGATUS, Gray. Very simple at base; leaves l J-4 long, linear or lim ar laiieeolate ; jicdnn- 
cles mostly opposite in a very narrow elongated jianiele ; sterile tilameiit glabroii-.— Xew M. xieo. 
30. P. UXARIOIDES, Gray. Many-stemmed from a woody Iiase, very leafy; leaves I lon^^ nr less, 
spatulate-linear to subulate; peduncles alternate; pauiele u;trro\v. subseeiind ; palat.- aud >t< iile lila- 
ment bearded. — New Mexico and Arizona. 
(c.) .Flowers axillary upon the ea'si)itose-depres.sed biaiieln s. whirh arc leafy to (lie stinimit. 
31. P. CiESPiTosrs, Nutt. Flowers sei uiid, G-9" long, s, pn-. -ji'i. 
* » # * * Pruinose- or viscid-pubescent, or with serratt- h aves, or with an interrupted iianiele of 
densely-flowered cymelets ; inflorescence usually thyrsoid ; corolla never red or searh l. 
(a.) Sterile filament longitudinally yellow-beanh <l ; eoiulhi canipauulate or lu'oad funneUorm above, 
slightly bilabiate. 
(1.) Leaves lanceolate, subentire, the upper ones at least and the flowers viscid-iiubeseent : jianiele 
strict, with short apjiressed peduncles. 
32. P. PUMiLUS, Nutt. Dwarf, few-flowered, the cauline leaves a little narrowed at base ; corolla 
Bomewhat glabrous. — S. Idaho. 
