﻿PLANTS HEERMANNIAN^ 45 



ERIOGONUM roseum, nova species. Herba sesquipedalis erecta virgato-ramosa 

 araclmoideo-tomentosa. Caulis bracteis parvis appressis ternatis ovato-acutis fusco- 

 rubentibus ad quemque nodum munitus ; basi foliosus, dein scapiformis multumque 

 infra medium trifurcatus, brachiis cum verticillo unico ternato, nunc ramulos ac folia 

 prodente, alternantibus, nunc et capitulis sessilibus imse furcse insidentibus ; abinde 

 foliis singulis parvis solumque ad nodos ramiferos sitis. Folia anguste spathulato- 

 ovata, margine undulata, in petiolum longum attenuata, superne rubentia, radicalia 

 cum pedicellis li-2" longa. Involucra sessilia plerumque solitaria, acheniformia, tu- 

 buloso-campanulata, secundum ramos subsecunda nonnunquam et terminalia. Flores 

 parvi exserti incarnati vel purpurei. Paleolse florales setiformes, inclusse. 



The whole plant, except the flowers, covered with a white arachnoid tomentum. 

 Stem about lh foot high, virgately branched with ternate bracts at each node, leafy 

 at the base, hence scapiform and trifurcate below the middle, with the prongs al- 

 ternate to a solitary ternate whorl of leaves, sometimes producing accessory branches 

 and leaves from their axils, and sometimes capitula seated in the very centre of the 

 3-furcation ; a small solitary leaf at each further ramification. Leaves narrowly spa- 

 thulate, obovate, undulate at the margin, attenuate into long petioles, with a reddish 

 tinge; radical leaves H-2" long including the petiole. Involucres sessile, mostly 

 solitary, acheniform, tubuloso-campanulate, unilateral along the branches and ter- 

 minal. Flowers small, glabrous, exserted, pinkish or purpurescent. Floral chaff 

 setiform, included. Posa Creek, September. 



ERIOGONUM plumatella, nova species. (Specimina incompleta.) Caulis vix 

 pedalis, dense floccoso-tomentosus, rami divaricati, spiculis densis cum internodiis vix 

 3-linearibus pinnati. Folia . . Bracteas patentes, in spicis triangulares, in ramis 

 oblonge-lineares obtusas. Involucra solitaria, campanulata, segmentis rotundatis, 

 incarnato-fusca. Flores albi lobis obovatis. 



(Specimens incomplete.) Stem hardly a foot high, densely tomentose, terminat- 

 ing in divaricate panicles pinnate with crowded spikelets with internodes scarcely 

 3'" long. Leaves . . . (apparently all radical.) Bracts spreading, those of the 

 spikelets triangular, those of the branches oblong linear obtuse. Involucres solitary, 

 campanulate, with rounded segments and of a reddish-brown color. Flowers white, 

 with ovate lobes. Posa Creek, September. 



ERIOGONUM geniculatum, nova species. (Specimina incompleta.) Caulis circi- 

 ter pedalis, (seque ac involucra) pallide virens glaberrimusque ; ramis divaricatissime 

 furcatis. Folia .... Bracteae minutse late triangulares, patentes. Involucra 



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