Class XXL— CRYPT0GAMIA< 



808. EQ.UISETUM. £. (Horse-tail, Shave^ 



grass.) 



Floral receptacles peltate, many angled, col- 

 lected into a spike. Indusiurti corniculate. Sta- 

 nnhia 4, Style none. Seed 1. 



Herbaceous and leafless plants with, fistulous striated 

 stems which are either simple or branched, ramuli most- 

 ly vertici Hated, — articulated, joints surrounded with den- 

 tated sheathes. The vernal flowering' stems, for the roost 

 part, quickly perishing- are succeeded by others which 

 are barren and more durable. 



Species. 1. E. arvense. 2. syhaticnm. 3. ■uliginosum. 

 4:. palmtre- 5. scirpoides. 6. ht/emale. (Shave-grass). Ve> 

 ry abundant on the banks of the Missouri below the 

 Platte, and called " Rushes;" it is found to be injurious 

 to horses which feed upon it for any considerable 

 length of time. 



A genus principally iniigenous to Europe. 



309. LYCOPODIUM. L. (Club-moss.) 



Capsules reniform, l-celled, 2-valved, many- 

 seeded. Seeds very minute, resembling powder. 



Herbaceous and branched, repent or erect; leaves 

 imbricated and often spreading ordistichal, sempervirent; 

 spikes simple or dichotomous, sessile or pedunculate, 

 terminal or axillary. Seed inflammable. 



Species. 1. L. carolinianian. 2. clavatum. 3. trista- 

 shyum. Ph. Nearly allied to the preceding, b;it with the 

 leaves entire, and not serrate as in No. 2- 4. complana- 

 ticm. 5. sabiiKefolimn. 6. dendroideiDn. (Ground P;T>e ) 7, 

 annotinum. 8 inundaUim. 9. alopeciiroides. 10. selagi. 

 noides. 11. rupestre. 12 albidulum. A mere variety of 

 the following? 13. apodum. 14. hicUiulum. 



