Blake — Revision of Dimerostemma 15 
1.4 mm. wide, the narrow ciliate wings continuous with the two 
‘strong lanceolate ciliolate flattened awns, these often lacerate- 
lobed on each side at base, and with one or two tiny attenuate 
squamelloid process#s between them, unequal, up to 3.4 mm. long. 
— Cass. Bull. Soc. Philom. 1818. 58 (1818), as brastliana; Baker 
in Mart. Fl. Bras. vi. pt. 3, 231 (1884). Serpaea ovata Gardn.! 
Lond. Journ. Bot. vii. 296 (1848). Oyedaea ovata (Gardn.) Benth. 
ex Baker in Mart. |. c. 207 (1884). — Brazin: Goyaz: dry upland 
campos near Arrayas, 1840, Gardner 3852 (TYPE COLL. of S. ovata: 
BK, fragm. G). Cuur.: Hort. Lisbon (photog. G, of type of D. 
brasilianum Cass. in hb. Juss.). 
The date of collection of Gardner’s no. 3852 is given by him 
(Il. c.) as April; the Kew specimens however are labelled February, 
the one in the British Museum July. 
Although the leaves of his Dzmerostemma brasiliana(anum) are 
described by Cassini as alternate, they are shown by the photo- 
graph of the type to be opposite. The origin of Cassini’s specimens 
is at present involved in some mystery. The only definitely known 
habitat for the species is Goyaz, where it was found by Gardner in 
1840, and no collector is known to have entered that province 
before Martius in 1818 (see Urb. in Mart. Fl. Bras. i. pt. 1, 146). 
One species of Dimerostemma, D. lippiordes of the provinces of 
Minas Geraes and Sao Paulo, was in cultivation at Lisbon as late 
as 1874 at least, as shown by a specimen in the Kew Herbarium, 
but this species, although growing in provinces which were visited 
by collectors in communication with Lisbon before the date of 
publication of Cassini’s genus (1817), can by no means be identical 
with the plant in the herbarium of Jussieu on which Cassini's 
species was based, which can be identified only with S. ovata among 
_ the known species of the genus. It is probable that this species will 
later be found to have a much more extended range than is at 
present known. 
6. D. lippioides (Baker), comb. nov. Suffrutescent, erect, 
branched in inflorescence, bearing 3-12 heads. Stem brownish, 
striate, strigose-pilose with ascending or somewhat spreading 
flexuous hairs with subtuberculate bases. Leaves opposite or those 
of inflorescence partly alternate, orbicular or orbicular-oval, obtuse 
or rounded at apex, truncate or truncate-rounded at base, crenulate- 
serrulate with 12-23 pairs of appressed teeth, triplinerved and reti- 
