312 



DICOTYLEDOryrOUS. 



Genus 1 SAURURUS. 

 Genus the same as the order. 



1 S Cernucs. Stem erect, furrowed, with jointed hairs. Leaves cordate, 

 pubescent, entire. Flowers in spikes, opposite the leaves. Perianth tubular, 

 hairy, split on the upper side. 



%■ May — July. Bogs and ponds, very common. 2-3 ft. 



Order CXLI. AMENTACE.E. 



Flowers monoecious, or dioecious. Sterile florets in aments, 

 with scales, or scaly perianth. Stamens inserted into the 

 scales. Anthers 2.celled. Fertile florets in aments, with 

 scales or perianths. Ovary free, simple. Stigmas many. — 

 Fruit a drupe, or a bony, membranaceous capsule, usually 1- 

 celled. Seed 1, or many. Trees or shrubs. 



Sub-Order I. SALICINEiE. 



Genus I SALIX. 



Dioecious. Sterile florets ; ament cylindrical, scales 1- 

 flowered, imbricate, with a nectariferous gland at the base. 

 Perianth none. Stamens \-b. Fertile florets^ scales l-flow- 

 ered. Perianth none. Stigmas 2, often cleft. Capsule 1- 

 celled, many seeded. Seeds comose. 



1 S MuHLENBERGiANA. A Small shrub, often decumbent, with pubescent 

 branches. Leaves lanceolate, pubescent, hoary, entire, white, tomentose be- 

 neath. Flowers diandrous, appearing before the leaves. Scales oblong, vil- 

 lous along the margin, white, with a red apex. Germs ovate-lanceolate, on 

 long pedicels, hairy. Styles short. Stigmas bifid. 



^l April. Dry woods. 2-5 ft. 



2 S Tristis. a small shrub. Leaves linear-lanceolate, acute at each 

 end, entire, with revolute margins, glabrous above, rugosely veined, and to- 

 mentose beneath. Stipules none. 



^2 March — April. Sandy soils. 1-4 ft. 



3 S RosMARiNiFOLiA. A Small shrub, the branches silky, pubescent. — 

 Leaves linear-lanceolate, acute at each end, entire when young, pubescent 

 above, silky beneath, becoming nearly glabrous when old ; scales of the ament 

 obtuse, ciliate. Germs lanceolate, villous. Stigmas bifid. 



T^ March— April. Wet lands. 1-3 ft. 



4 S CoNiFERA. A small shrub, with the young branches pubescent, with 

 cone like excresences at the extremities of the branches Leaves oblong-lan- 

 ceolate, acutely serrate towards the apex, glabrous on the upper surface, to- 

 mentose beneath, on long petioles. Scales lanceolate, villous. Germs lan- 

 ceolate, villous. Stigmas 4. 



Yl March — April. Dry soils. 4-8 ft. 



5 S Discolor. A shrub, with brownish branches. Leaves ohhng, some- 

 what obtuse, remotely serrate, glaucous beneath. Stipules lanceolate, serrate. 

 Stamens 2 ; scales oblong, hairy, black. Germs lanceolate, tomentose. — 

 Stigmas 2-parted. Bog xviUow. 



^2 April. Low grounds. 8-15 ft. 



