PAMMEL OX THE SEED-COATS OF EUPHORBIA. 



5<^7 



EXPLANATION OF PLATE XIL 



All seeds drawn to the same scale magnified 12 times. 



The figures are numbered to correspond to the species in Gray's Manual, Revised 

 Edition, pp. 452-456. 



3- 

 4. 

 S- 

 6. 



7- 



S. 



9- 



10. 

 II. 

 12. 

 13- 

 14. 

 IS- 

 16. 



17- 



17a. 



iS. 



iSa. 



iS*. 



jSc. 



iSrf. 



iS^. 



•9- 



19a. 



Euphorbia f polygonifolia, "L. 



" I Geyeri, Engelm 



" I petaloidea, Engelm 



" [ serpens, UByii j.. . 



Euphorbia f scrpyllifolia, Pers 



fflyptosperma, Engelm. 



" ■; mactilata, L 



" hiimistrata, Engelm. .. 



" [ Preslii, Guss 



hexagona, Nutt 



Euphorbia . 

 Euphorbia 

 Euphorbia 

 Euphorbia . 



Euphorbia • 



Anisnpliylltim. 



margiiiata, Pursh . 

 corollata, Jj 



dintaia, Michx ~| 



hcterophylla, L -* 



Ipecacuanha:, L, 



f Darlingtonia, Gray 



\ ohtusaia, Pursh 



[ platyphylla. E. 



I dictyospcrma, Fischer & Meyer. 



C Helioscopia, I 



f Esula, I 



\ Cyparissias^ L 



t Nicceensis, All 



I Peplus, L 



( cominutata, Engelm 



Lathyris, L 



Zvgopliyllidium . 

 Petaloma. 

 Tilhywalopsis, 

 Poiiisetiia. 



Tilli Y III at us. 



