STUDIES OF THALICTRACEAE — I. 57 



largest, often unequally 3-lobed, laterals smaller, not always 

 oval and entire ; leaflets of upper leaves more elongated and 

 narrow, also more acutely lobed, all leaflets strongly veiny 

 beneath, less conspicuously so above : all plants probably 

 more or less hermaphrodite, the flowers of the more fertile 

 mostly with one or two stamens, often with none, their sepals 

 caducous, those of the more staminate plant large, elongated- 

 oval, somewhat persistent and deflexed ; filaments very long, 

 clavellate only above the middle and not strongly so, anthers 

 very short in proportion, oblong-oval : immature carpels very 

 minutely setulose, the mature less obviously so, very large, 

 somewhat oblong-oval but obliquely so, the opposite ends 

 being manifestly a little curved in opposite directions, neither 

 quite sessile nor notably stipitate, not black, but dark greenish 

 brown, the ribs rather low. 



The type sheets of this species are in my own herbarium, 

 and were collected at Monkton, Vermont, in July and Septem- 

 ber, 1880, by C. G. Pringle. The species is named in allusion 

 to the short but bristly nature of the pubescence, the like of 

 which I have met with in no other meadow rue. Its achene 

 has a peculiar outline for a member of this group. 



Thai,icTrum Mortoni. Probably at least a yard high and 

 not slender, the stems striate, glabrous, purplish : lowest leaves 

 a foot long, the breadth somewhat less, the leaflets uncom- 

 monly large, doubtless of firm texture in age, not blackened 

 in drying, of a rather deep green above, paler and glaucescent 

 beneath and with a few rather prominent but slender and only 

 slightly divergent veins, both faces glabrous ; terminal leaflets 

 \% inches long, 1 inch wide far above the middle, obtuse at 

 base, sharply yet not deeply 3-lobed at summit ; laterals mostly 

 1 inch long or less, obliquely ovate to lance-oval, acute, usually 

 entire : sepals of staminate plant obovate, very obtuse, of the 

 pistillate oval, acute ; filaments only slightly clavellate, and 

 that from near the base, in no part as wide as the narrow 

 linear oblong acute anthers : neither mature nor even full 

 grown carpels known, those half grown fusiform, glabrous. 



