170 



12. Veil not conspicuous, soon evanescent. I. subochracea (Peck) Earle* 

 Veil conspicuous, webby-fibrillose ; stipe longer and more fibrillose. 



I. subochracea Burtii Peck 



13. Spores spiny, echinate, aculeate or stellate. 14. 

 Spores angular or tuberculate, not spiny. 17. 



14. Stipe fibrillose, short, 2.5 cm. 15. 

 Stipe subpruinose, longer, reaching 5 cm. or more. 16. 



15- Pileus hygrophanous, dark brown when moist, canescent when dry. 



/. maritima ( Fr. ) Sacc. 

 Pileus dry, yellowish-brown. /. echinocarpa Ell. & Ev. 



16. Lamellae crowded, rounded behind ; spores 10-12/iX 7 _ 9A i - 



I. subfitlva Peck 

 Lamellae subdistant, narrowed behind ; spores globose, 12//. 71 rigidipes Peck 



17. Stipe more than 3 cm., ferruginous, apex white-pulverulent. 18. 

 Stipe less than 3 cm., pale brown, apex not. white-pulveruJenf. 



I. maritimoides (Peck) Sacc. 



18. Pileus and stipe white ; spores globose, nodulose-roughened. 



I. infida (Peck) Earlef 



Pileus umbrinous ; stipe ferruginous ; spores elliptic, angular. 



I. lanuginosa (Bull.) Gillet 

 New York Botanical Garden. 



SHORTER NOTES 



A Question for Morphologists. — Recently % the theory- 

 has been advanced that the cotyledons of angiosperms are phy- 

 logenetically related to the so-called "foot" of bryophytes and 

 pteridophy tes and bear no morphological relation to foliage leaves. 

 That the cotyledons which are primarily suctorial organs, should, 

 under unusual conditions, enlarge, elongate their petioles, and de- 

 velop much chlorophyll is perhaps no indication that they are 

 modified foliar appendages, for the hypocotyl under like conditions 

 also enlarges and becomes capable of photosynthesis as shown by 

 Halsted.§ What bearing, if any, on this point, has the fact that 

 branches may be induced to grow in the axils of the cotyledons by 

 snipping off the plumule of the seedling ? The accidental finding of 



* Agaricus (I/ebeloma) subochraceus Peck, Reg. Rept. 23.: 95. 1873. Hebeloma 

 subochraceum Sacc. Syll. 5: 796. 1887. 



X Agaricus [Hebeloma) infidus Peck, Reg. Rep. 27: 95. 1877. Hcbe'oma hifi- 

 dum Sacc. Syll. 5: 796. 1887. 



% H. L. Lyon. The Phylogeny of the Cotyledon. Postelsia, 1901 : 55— S6. 1902. 



\ B. D. Halsted. On the Behavior of Mutilated Seedlings. Torreya, 2 : 17. 1902. 



