ORDER CXV. AMENTACE^. 505 



Order CXIV.— SAURURA'CE^E. 



Flowers naked, seated upon a scale. Stamens 6, li}'pogy- 

 nous, filaments slender. Anthers cuneate. Ovaries 4, distinct, 

 each with 1 ovule. Stigmas 3 — 4. Fruit consisting of 4 in- 

 dehiscent nuts. Leaves alternate, stipulate. Flowers in spikes. 

 Herbaceous plants, growing in marshy places. 



Gexus L— SAURU'RUS. L. 7—4. 

 (From saura, lizard, and oura, tail.) 



Genus the same as the Order. 



1. S. cer'nuus, (L.) Stei7i erect, furrowed, with jointed hairs. 

 Leaves cordate, pubescent, entire. Floxcers in spikes, oppo.-ite the leaves. 

 Perianth tuljular, hairy, split on the upper side. — 2f. May — July. 

 Bogs and ponds. Very common. 2 — 3 feet. 



Order CXV.— AMENTA'CE^. 



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 pe- 

 rianths. Ovary free, simple. Stigmas many. Fruit a drupe, 

 or a bony, membranaceous capsule, usually 1-celled. Seed 1, 

 o-r many. Trees or shrubs. 



ANALYSIS. 



1. Flowers ■without calyx or corolla 2 



Flowers with at least a bract-like calyx 5 



2. Fruit capsular 8 • 



Fruit not capsular 4 



3. Capsule 1-celled Salur, 1 



Capsule 2-celled PopiUuft, 2 



4. Fruit a drupe Jfi/nra, 3 



Fruit a round bur Comptoniiv, 4 



5. Fruit cone-liks G 



Fruit not cone^.l/ce 6 



6. Middle-sized or large trees Setula, 5 



Shrubs Alnus, 6 



Small trees 7 



7. Scales 2-flowered , Carpintu, 7 



Scales 1-flowered 0«trya, 8 



B. Fertile aments globose ' 9 



Fertile aments not globose 10 



9. Fertile aments on long peduncles Platatinit, 9 



Fertile aments near tlio base of the sterile LiquUhtmhar, 10 



10. Fruit an acorn Quficiio, 11 



Fruit a prickly bur Co-''taii^it, I'J 



Nut ovate Coi^jlm,\i 



Nut triquetrous Fai/us. 14 



22 



