272 KANSAS UNIVERSITY SCIENCE BULLETIN. 



AMARANTACEjE. 



Anomalous stem structure occurs in species of the following genera: 

 Deeringia, Celosia, Hermbstxdtia, Rodetia, Bosia, Cliamissoa, Amarantus, 

 Acnida, Pupalia, Psilotnclnim, Aenia, Achyratithes Telanthera, Alter- 

 nanthera, Gomphreita, Frcelichia, and Hebanthe. 



Like the Nyctaginacese, the secondary meristems develop in the par- 

 enchymatous pericycle. 



LORANTHACEJE. 



Successive rings of growth appear in Nuytsia and Strychnos. 



BUXACE^. 



Secondary rings of bundles occur in Simmondsia californica. These 

 secondary rings of bundles arise in the parenchymatous portion of the 

 pericycle, internal to the pericyclic groups of sclerenchymatous fibers. 



According to Solereder (1908), only four families other 

 than Chenopodiacese have longitudinal ribs of collenchyma. 

 These are Cruciferfe, Amarantaceae, Labiatse and Umbelliferse. 



The stomata of Salsola kali var. tenuifolia are so orientated 

 that their pores are transversely arranged to the longitudinal 

 axis of both leaf and stem. In the family Batidacese a ma- 

 jority of the stomata are similarly orientated. In the family 

 Loranthaceas, on the branches of Antidaphne, Arceuthobmm, 

 Lepidoceras, Loranthus, Nitytsia, and Viscum, a similar orien- 

 tation is found. In some members of Santalacese the pores of 

 the stomata are transverse to the longitudinal vein and in other 

 members they are parallel to the vein. 



CalUgonum comosum L. Herit., a desert plant of the family 

 Polygonaceae, with advanced reduction of foliar organs, has 

 a layer of palisade tissue in the primary cortex and a sheath 

 of collecting cells below the palisade cells. There is also a de- 

 velopment of aqueous tissue in the cortex. All these character- 

 istics are found in Salsola. 



METHODS. 

 All the drawings were made from sections cut in paraffin, 

 with the exception of a few drawings made from macerated 

 material, and the drawings 22 and 23 made from the whole 

 leaf. The permanent sections were stained in safranin, but 

 a number of the drawings and all of the measurements were 

 made from sections stained with iodine. 



