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Jepson Field Book volume 27 page 188 | University and Jepson Herbaria Archives, University of California, Berkeley

 
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Jepson Field Book volume 27 page 188
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Berkeley ----------  - Lepidium. I have just examined a series of spms. from all parts of Cal. of L. medium Greene. These have all passed as this, that is L. intermedium Gray, by the most diversely minded Cal. botanists. They are all alike in habit, foliage, fruit, -- but the cotyledons may be either incumbent or accumbent! Heller has distrib. a Truckee plant (his no. 7090) [? Possibly 7040 or 7070] as L. virginicum. It is clearly our L. medium and evidently our plants should be called L. virgin. Moreover Thellung makes our a subsp. texanum of virginicum.    My Barstow plant, no. 6623, passes as L. apetalum of Am. authors. So Hall's Yosemite (9133). But mine has accumbent cots. and has incumbent cots! Which shows again the value of the cot. position as a test in ::::::::: 1917 -----  this species!    Lepidium apetalum, coll. by W.W. Jones, Bozeman, Mont. is in all respects a beautiful match for my Scott Valley, Lake Co., 1892. If the petals may be "minute or none" in L. divergens (cf. Rydberg, [illegible]. Col. 152" or ""generally present" in L. virginicum (Britton, Ill. Fl. 2:165), then they may well be present or absent in L. medium._    The ill. of L. densiflorum (apetalum) in Britton, l.c. shows a dif. plant probably from the L. apetalum of Col. authors. ----- _ I cannot distinguish specifically L. medium and L. virginicum any more than Thellung, but I go further than he does and reduce medium outright. ----- cf. Types Book, p.
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University and Jepson Herbaria Archives, University of California, Berkeley
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