187 



For the purpose of conip.iri.soii I have inserted hero A. l>e Candolle's original 

 description: 



"T. peltatum, lloribus polygamis, lilamentis (iliibrmibus, antheris longe aristatis, 

 earpellis sessilibus stylo longe aristatis, segmentis foliorum inferiornm peltatis." 



Besides Mr. I'ringle's plants, the only other specimen of this species known is the 

 type now in the Do Candolle herbarium, of which a sketch is here reproduced. 



As is seen in the description above, no type locality is given, nor is any indicated 

 on the label of the type specimens. The postscript to C. Do Candolle'a letter, quoted 

 above, while not conclusive, seems to throw some light on this point, and is as follows: 



"The Prodroinus type of Thalictrum peltatum is labeled thus: 'Mescique M'Alaman 

 1811.' Now, Alaman was minister of the interior of Mexico and a friend of my 

 grandfather, to whom he has sent many other plants, but I do not know whero ho 

 collected them." 



From this it is seen that Alaman was stationed in the City of Mexico, and it is not 

 improbable that Mr. Pringle's specimens may have been collected at or near the 

 typo locality. It is well known that the Cucrnavaca region has long been the resort 

 of the wealthy and influential class of the City of Mexico. 



Explanation of Plate.— a. Leaf; b, fruit with style, tiio latter broken off. (Tracing made from the 

 tyP* specimen now in the De Candolle herbarium at Geneva, Switzerland, furnished by M. Caniniir 

 Do Candolle.) 



dd. Leaflets small, with small orate teeth. 



Thalictrum jaliscanum Rose, sp. uov. 



Stems tall, glabrous and glaucous; upper leaves ternate, the leaflets peltate, 

 orbicular, 6 to 10 toothed, glabrous; inlloresceuco a large open panicle; carpels nar- 

 rowly elliptical, somewhat cuneate at base, strongly nerved. 



Collected by J.N. Hose on the table-land between Colotlan and Bolauos, State of 

 Jalisco, September 7 to 9, 1897 (No. 2840). 



cc. Not at all glaucous ; akenes subsesxile, one side straight. 



Thalictrum cuernavacanum Rose, sp. nov. 



Stems low, 6 dm. high, somewhat branching above, more or less pubescent; leaves 

 2-ternate; leaflets nearly orbicular, peltate, with broad, rounded, or somewhat 

 apiculate cremations, slightly roughened above, densely puberulent beneath, pale, 

 ■15 mm. or less long ; flowers in an open panicle, perfect; stamens with short apicula- 

 tions; styles long; akenes with one side straight, the other curved, narrowed at 

 base, but more strongly towards the apox, tho fruit with 3 or 4 nearly parallel ribs 

 sometimes uniting, slightly scabrous, 4 mm. long. 



Collected by Mr. C. G. Pringle near Cuernavaca, State of Morolos, 1896 (No. 7238) 

 and 1898 (No. 6878). 



bb. Akenes a little longer than broad. 



e. Leaves 1 or 2 ternate; leajtetx large, orbicular. 



Thalictrum pringlei Wats. Proc. Am. Acad. 25 : 111. 1890. 



The type of this species comes from near Guadalajara, State of Jalisco, and was 

 collected by Mr. C. G. Pringle, June 29, 1889 (No. 2478). We have a duplicate typo 

 (Type No. 687) in the National I forbarium. Here probably is to be referred Mr. Prin- 

 gle's No. 2478, with similar data, but described as T. pubigerum, which it can not bo. 

 Two peculiar forms of this species were collected by me on the west range of the 

 Sierra Madre, and are characterized below. 



