[801124 
XII. A Revision of the Genus/Nototriche, Turez. 
By AnTHUR W. Hit, M.A., F.L.S. 
(Plates 27-30.) 
Read 21st January, 1909. 
INTRODUCTION. 
AMONG the rosette and cushion forming plants of the high Andes there are two 
well-defined groups of Malvaceze which are distinguished from other members of this 
order by their apparently acaulescent habit and thick, woody, underground caudex. 
In the one case the flowers are provided with involucres and are borne in the axils of 
the basal leaves; such plants are typical members of the genus Malvastrum of Asa 
Gray. The other group, which is also the larger, is distinguished especially by the 
adnation of the peduncles and stipules to the petioles and by the absence of the involu- 
eral bracts or epicalyx (Malvastra Phyllanthophora, A. Gray). 
For this latter group the name Nototriche of Turczaninow has been revived *. 
In a recent paper f Count Solms-Laubach considers the revival of this name to be 
“ gänzlich unnóthig und müssig," but the characters which serve to differentiate the 
genus Nototriche, as here understood, from Malvastrum appear amply to warrant the 
separation. In Nototriche there is no epicalyx, which is almost always found in Mal- 
vastrum 1, the peduncles are adnate to the petioles, and the stipules are always united 
with the petioles to form a kind of protective vagina, and these features are peculiar 
to the genus Nototriche. The carpels are also beaked to a greater or less extent in 
practically all the known cases and are more or less dehiscent. 
The name Malveopsis, Presl, has also been revived by O. Kuntze$ to supplant the 
names Malvastrum and Malva: as this has not been followed by other writers. it is not 
necessary to enter further into the question in this paper. 
Before proceeding to the diagnoses of the numerous species, a short general account of 
the genus is given ; this is followed by remarks on some points of interest in the biology 
and geographical distribution of the various species. A few notes are added on the 
collectors to whose industry we are indebted for our knowledge of the Andean flora. 
The numerous forms collected together under the genus Nototriche constitute a very 
natural group. Out of some sixty-seven species already known, only two are annuals, 
though doubtless many more exist. 
The Root and Stem.— Among the perennial species the habit of growth is essentialiy 
the same in all cases ; there is a firm woody underground stem passing imperceptibly into 
the tap-root and in some few cases there appears to be a more or less definite aerial stem. 
* Hill, A. W., in Engl. Bot. Jahrb. xxxvii. (1906) p. 577. 
t Solms-Laubach in Bot. Zeit. 1907, p. 123. 
+ In M. nubigena the epicalyx is sometimes aborted, and in the specimens of M. sre collocteG dy. Wega 
it is undeveloped. § O. Kuntze, Rev. Gen. Plant, iii, 2, p. 20, 
SECOND SERIES.—BOTANY, VOL. VII. ao 
