OF ARTS AND SCIENCES. 209 



Gltptopleura Eaton. To the characters of this curious little 

 genus, as made known by Eaton and by Bentham, may here be added 



4. M. LACiNiATA. Hymenonema ? laciniatum Hook. Scorzonella laciniata 

 Nutt. Calais {Scorzonella) laciniata Gray, 1. c, cum 



Var. PROCEKA. Calais {Scorzonella) (jlauca, procera Gray, Proc. Am. Acad. 

 7, p. 364. Hymenonema ? glaucum Hook., forma minor. 



5. M. LEPTOSEPALA. Scorzonella leptosepala Nutt. Calais Bolanderi Gray 

 Proc. Am. Acad. 7, p. 365. Calais laciniata Gray, 1. c. 8, p. 392 ; pi. coll. Hall^ 

 313. — The narrower and gradually tapering scales of the involucre, as well as 

 the smaller and mostly fewer-fiowered heads, appear well to distinguish this 

 species, which was indicated by Nuttall. 



•*- -1- Involucri squamae omnes obtusiusculas : pappus e paleis 5 bifidis arista e 

 sinu exserente dimidio triplove brevioribus constans : ligulse breviusculaa. 

 Acaulis, scapis simplicissimis nudis. 



6. M. Paerti. Calais Parryi Gray in Bot. Wliipp. & Bot. Mex. Bound, 

 p. 104. — Akenes unknown, but probably beakless. The species was referred to 

 Calocalais, on account of the pappus. 



§ 8. EuMiCROSERis. Pappus e paleis aristatis 10 vel pluribus : cast. Eitcalais. 

 . Species 2 australes. 



7. M. PTGM^A Don. Annua, radice exili. — Chili. 



8. M. FoESTERi Hook. f. Biennis, radicibus fusiformibus. — New Zealand 

 and Australia. 



§ 4. EtrcALAis. Pappus baud plumosus, sordidus, e paleis aristisve 5, raro pau- 

 cioribus : achenia saepissime breviuscula, ab apice lato truncato vel infra 

 medium deorsum angustata : involucrum duplex, exterius breve calyculatum. 

 Annuffi, acaules, radice exili, scapis simphcissimis nudis. — Calais § Eit- 

 calais DC. 



* Aphantocarphece, nempe aristis pappi fragilibus nudis ima basi tantum dilatatis. 



9. M. APHANTOCARPHA. Calais aphantocarpRa Gray in Proc. Am. Acad. 

 6, p. 552. 



Var. TENELLA. Forma pusilla, pappo 2-5-mero deciduo nunc evanido. 

 Calais (Aphanocalais) tenella Gray in Bot. Whipp. p. 57, 58, t. 17. — Evidently 

 this is a depauperate state of tiie species which I later described as Calais 

 apliantocarpha. It is so large and tall as to render the older specific name inap- 

 propriate, so that in the transference I prefer the later name for the species. 

 The slight contraction of the very summit of the achenium in the C. tenella does 

 not seem to be wholly constant, nor of specific value. 



* * Eiicarphece, nempe paleis pappi sat magnis, 



-t- Ovato-lanceolatis ovatisve in aristam pi. m. acuminatis. 



10. M. BiGELOVit. Acheniis brevibus (lin. 2 longis) subturbinatis sub apice 

 non constrictis ; pappi paleis ovato-lanceolatis extus tantum scabf rulis in aristam 

 gracilem sensim productis. — Calais Bigelovii Gray, in Bot. Whippl. p. 57, t. 17. 

 C. Dour/lasii Gray, Bot. Whipp. 1. c. (forma paleis pappi fere lanceolatis) & 



VOL. I. 27 



