408 HYDBOPHYLLACEAE, (WATERLEAF FAMILY) 



Perennials; leaves more or less silky. ^ ,/ ' )Ain .- 



Gaespitose; sericeous throughout . ,' ' . • * . • 13, P, sericea. 

 ] ,Scarcel:|r caespitose; merely pubescent or ^ely ^ir^ute . ,,^^^,.P^ idalioensia. 



1. PhaceUa Knightii A. Nels. Bull. Torr. Bot. Glub 28: 229.' 1901. A 

 diminutive annual 2-5' cm. high, minutely puberulent, simple or branched: 

 leaves few, s'emifleshy; orbicular to o-?-ate, entire or nearly so, 5-10 mm; long: 

 flowers few, subspicate and nearly se&sil^ in the upperrhost' 'axils: corolla 

 narrowly campanulate,; about 6, pma. Iprig,: longer tti^.tii^ linear-spatujate 

 calyx-lobes, the limb purple, the, tube yellowish: seeds about 14, oblong, large 

 for the plant, conspicuously aJveolate-hexagonal-retic^late, iglightly wing- 

 margined by tl^e cellular cpat.^In 1;he crevices, of tjie naked ^asatph c^ys, 

 western Wyoming. „, . 



,2. Phacelia linearis (Pursh) Hplz. . Conirib'. Nat. Herb. 3: 124,2. ., 1895. 

 Stenis 1-3 dm. high, at length paniculate-branched,, hispid or roughish-;jbirsnte, 

 usually also minutely cinereous-pubescent: leaves mostly sessile, lineaj or 

 lanceolate and entire or some of them deeply cleft; the lobes few or single, 

 Unear or lanceolate, entire:' spikes or fe^ike-like racemes thyrsoid-i)aniculate, 

 at lengtfi elongated and erect: corolla bright violet or sometimes vyhite:. ovules 

 12-16: riajisule shorter than thecalyx; seeds oblohg, coarsely favose-reticiila;red, 

 P. Menziesii. — Wyoming to California and British Columbia. ' ' " ^" 



3. PhaceUa leucophyUk Torr. Frem. Rep. 93. l845. Perennial by a stout 

 rootstock, pale, densely sUky-pubescent; stems 3-5 dm. high: leaves lanceo- 

 late to oblong, 5-10 cml long, the lower long-petioled: spike-like branches of 

 the scorpioid cymes dense, 2-8 cm. long; flowers sessile, numerous,' about 

 8 mm. high: calyx-lobes hispid, oblong^laalceolate' or linear, somewhat shorter . 

 tban the white or bluish, 5-lobed coroUa: corolla-appendages in pairs bett^een 

 the filaments: filaments exserted, glabrous or sparingly rhairy: .ovules '2' on 

 each placenta. P.drcinata,; — In dry soil; Colorado to iNarth Dakota and to 

 Idaho. ,'' ,,; I ■- ^\ , .'■. < 



4. Phacelia > heterophylla Pursh, Fl. 140. 1814. Much Uke the preceding 

 but pirobably only biennial, the stems single, or rarely more, from the semi- 

 fleshy root, erect, 3-5 dm. high; pubescence of two kui3s, a fine canescence 

 and more or less hirsute-hispid hairs,:. Ifia^yes simple, or some of them with 

 divergent, lanceolate or linear lobes near the base: inflorescence hispid; the 

 dei;ise spikes? thyrsoid-congested: corolla bluish, longer. than the fi^>jlong- 

 lanceolate , or linear calyx-lobes: fila,ment£J much exserted, sparingly bearded. 

 P . circinata in paxt. (P. biennis A. Nels. 1^ p,,26: 132.)— -Colorado a,nd Wyo- 

 ming and west to the Pacific States. 



4a. Phacelia heterophylla alpina (Rydb.) A,. Nels. Scarcely more than a 

 reduced form of alpine stations, tending to become perennial, (i*. alpifia 

 Rydb. Mem. N. Y. Bot. Card. 1: 324! 1900.)— In the high mountains. 



5. Phacelia splendens . Eastw. Zoe 4;. 9. 1893. Annual, erect, 2-3. dm. 

 high, usually simple-stemmed; stems glandular or glabrous: leaves pinnately 

 parted into threcjor four pairs o| alternate diyisions, crenate or bluntly lobed 

 and oblique at base, nearly glabrous; glanidular on the rachis: scorpioid cyme 

 on a naked , peduncle; flowers on short Jpedicels: calyx white-hirsute and 

 sUghtly glandular^ the lobes linear-lar^ceoJate, 4^ mm. long, slightly surpassing 

 the ripe capsule: corolla brig&t blue, rarely white,, about 1 cm. in diameter, 

 divisions obtuse: stamens and style cpnspicuously exserted: capsule glandular 

 and hirsute; seeds with thg, central ridge very prominent, cyinbiform, favose 

 over the whole I surface, but not corrugated. — In adobe soil; western Colorado 

 and Utah. ; > 



6. Phacelia deserta A. Nels. 1. c. 25: 278. 1908. Stem erect, simple or 

 branched from the base, 1-2 dm. high, densely leafy at base, sparsely so up- 

 ward, the whole 'plant canescent with a short close pubescence, obscurely 

 glaildular: leaves pinnate, the pinnae opposite, nearly oval and crenately 

 toothed, 5-9 pairs which' are nearly equal • in . size: inflorescence dense, 

 paniculate, of scorpioid cymes: sepals equal, lanceolate-oblong: corblla bright 

 blue, turbinate-campanulate, ,7 mm. long, lobes equalling or surpassing the 

 tube, rounded, entire; the obliquely vertical lamellae broad and conspibuoUSi 



