CATALOGUE. 207 



appressed ; achenia muricate and spinulose toward the apex, when mature 

 shorter than the beak. — The specimens now collected have leaves 3-4' long 

 and 5-6" wide, slightly toothed and very obtuse. The involucral scales are 

 certainly corniculate, as they are also in Hall & Harbour's plant : — no 

 European specimens are at hand for comparison. Arctic America and Lab- 

 rador to Alaska; Colorado, (357 Hall & Harbour;) Grreenland, Europe, and 

 Northern Asia. Uintas, on a peak at the head of Bear River ; 12,000 feet 

 altitude; August. (723.) 



Taraxacum phymatocarpdm, J. Vahl. Dwarf, glabrous ; leaves 1-2' 

 long, lanceolate, runcinate with rather short obtuse teeth, or nearly entire ; 

 scapes scarcely exceeding the leaves ; heads very small, blackish ; outer 

 involucral scales short, spreading ; inner ones 8-12, 3-4" long, not cornicu- 

 late, narrowly scarious-margined ; flowers very short ; mature achenia not 

 seen. — Described from Greenland specimens sent from Copenhagen with the 

 above name. The present specimen, a single one only, is rather larger than 

 those from Grreenland, but is plainly the same plant. It is assuredly not T. 

 Icevigatum. It must be noted that both T. palustre and T. phymatocarpum 

 are considered forms of T. Dens-leonis by Dr. Hooker. Uintas, with the last, 

 on a peak at the head of Bear River; 12,500 feet elevation; August. (724.) 



Glyptopleuea^ maeuinata. — Sandy Artemisia plain in Truckee Pass of 

 the Virginia mountains, in a canon of the Trinity Mountains, and in Union- 

 ville Valley, Nevada; 4-5,000 feet elevation; May, June. Also collected in 

 1870 at St. Greorge in Southern Utah by Dr. Edward Palmer, a form with 

 less developed outer involucral scales. Plate XX. Fig. 11. A single branch ; 

 natural size. Fig. 12. Outer involucral scale or bract. Fig. 13. Inner in- 

 volucral scale. Fig. 16. Corolla; each enlarged four diameters. Fig. 14. 

 Achenium and pappus ; enlarged two diameters. Fig. 15. Achenium. Fig. 

 17. Style. Fig. 18. Stamen; all enlarged eight diameters. (725.) 



' 6LYPT0PLEUEA. Heads many-flowered; tlie flowers all ligulate. Involucre subeyHndrical, 

 composed of 7-12 equal oblong-lanceolate herbaceous white-margined entire scales, and of 4-8 outer 

 spatulate or panduriform white-margined lacerate-friuged bracts, either nearly as long as the proper- 

 scales or reduced to calyoulate bractlets. Eeceptacle flat, naked. Achouia obconic-oblong, with a scurfy- 

 granulose whitish surface, obtusely 5-angled ; the angles more or less transversely rugose, the sides fur- 

 rowed and pitted, and the summit forming a shallow obscurely 5-toothed cup, from the interior of which 

 rises a short S-farrowed beak, its apex somewhat dilated and bearing a copious white capillary pappus 

 deciduous in a ring. — A small annual or biennial branching prostrate herb, forming a dense flattened tnffc 

 2-6' in diameter ; leaves somewhat fleshy, oblong, pinnatifid and laciniately denticulate with whitish 

 scarious teeth ; flowers purplish, terminal, nearly hidden by the leaves. 



The affinities of this curious plant are with Taraxacum, Chondrilla and TVillemetia, all of which have 

 the achenium suddenly contracted into a beak | the two former have more or less roughened or muricated 

 achenia, and the two latter a circle of teeth or a corona surrounding the base of the beak. 



