ELiEAGXACE^. 3i>l 



and styles exserted : akene smooth aud shining. — Throughout the northern 

 hemisphere; frequent in meadows and on stream-hanks in the mouniain» 

 The leaves vary much, from cordate and oblong (var. oUunyi folium, Meisn.) 

 to very narrow and attenuate at hase (var. linean'folium^ Wat.son). 



15. P. viviparum, L. A similar species, hut mosl/,/ Jaarf aw\ tuure 

 exclusively alpine: flowers sviallei , nearlij sessile in linear spths 1 to ;j InrheM 



long, at least the lower ones replaced by sessile ImlUets a line lomj. Same range 



as the last. 



§ 4. Herbs with flbrous roots, mostbj twininrj or rlimhinf/, and with mrtlate or 

 sagittate leaves: flowers in loose panicles or racemes or in terminal or axillary 

 clusters: perianth green with colored margins, b-parted, enlarging or keeled in 

 fruit: stamens mostlij 8: stiles or stigmas 3A — Tin aria. 



16. P. dumetorum, L., var. scandens, Gray. Smooth, twining high 

 over bushes, with cordate or sliglitly hulberd-sliaped acute leaves, and tlower.-* 

 in slender axillary sparingly leafy racemes : perianth long-attonuaie to the 

 slender reflexed pedicel; the outer sepals strongly winged upon tlie keel: 

 akene acutely triangular. — From the Atlantic States to the Upper Missouri, 

 Colorado, and Washington. 



Order 67. EL^AGNACE^. 



Shrubs, the foliage scurfy throughout with searious silvory or brown 

 scales, with regular flowers perfect or dioecious, the perianth lierbaceous 

 or colored withiu, its tube lined with a proniiueut disk bearing the 

 stamens, enclosing the 1-celled ovary, aud becoming l>iilpy or sj»ongy 

 without and bony within; fruit a membranous akene, closely covered 

 by the drupe-like calyx-tube. Flowers solitary or variously clustered 

 in the axils of the branchlets. 



1. £lseag:nus. Flowers perfect. Stamens 4. Leaves alternate. 



2. Shepherdia. Flowers diacious. SUimens 8. Leaves opposite. 



1. ELJEAGNUS, L. 



Calyx-limb cylindric-campaiiulatc or tubiihir bi-low, ]»arted above into 

 4 deciduous lobes, colored withiu. Disk glandulo.sc. Stamens adnatc to 

 the calyx and alternate with its lobes. Fruit drupe-like, with an oblong, 

 8-striate stone. — Leaves entire and petioled, and flowers axilhuy nn«l jn-di- 

 cellate. 



1. E. argentea, Pursh. A stoloniferous unarmed slirnb, 6 to 12 feet 

 high, the younger branches covered with I'erruginous scales : leaves bn-ad or 

 narrowly elliptic, silvery-scurfy and more or less ferruginous: llowers iiunior- 



1 P. Convolvulus, L., is low twining or ijroeumbcnt and niinuU'ly stabmiis, li-avea hal- 

 berd-cordate acuminate, flowers few in axillary fasctieles or small inU-miptcd raei-mca on 

 very short pedicels, outer sepals sharply keeled.— Introduced from Eunij>e, very ootninon 

 in the Eastern States, and found in Colorado and Montana. 



21 



