Mr Don on two New Genera (^Nepaul Plants. 8S 
and the East Indies, and are mostly dwarfish herbaceous perennial 
plants. The genus Chirita of Dr Francis Hamilton, which in- 
cludes the Bidymocarpus speciosa and hrfolia of Wallich, has a 
5-parted calyx, and a bifid stigma. They are small herbaceous 
perennials, with simple stems ; opposite serrated or crenated 
leaves, and solitary peduncled, axillary flowers. Their fruit, 
however, and consequently the structure of their seeds, is un- 
known to me ; but their habit, and having a divided stigma, 
would incline me to place them among the Scrophularmce^ ra- 
ther than in this order.— -I shall now proceed to give descrip- 
tions of Trichosporum and Lysionotus^ as well as the character 
of the family to which they belong. 
Nat Ord. DIDYMOCARPEiE. 
Calyx campanulatus, 5-fidus rarius 5-phyllus, lequalis. 
Corolla basi tubulosa, superne ampliata, campanulata : limhns 
5-lobus, sub-bilabiatus : lohis rotundatis, in sestivatione im- 
bricatis. 
Stamina 4 didynama, quorum 2 in Didymocarpo sterilia : fda- 
menta glabra, capillaria, fornicata : antherae ovales v. oblongs, 
nudae, biloculares, per paria parallelo-adnatae, in Trichosporo 
apice tantum conniventes. 
Pistillum 1 : germen ensiforme : stylus filiformis : stigma sim- 
plex, clavatum saepius excavatum, subinfundibuliforme. 
Capsula siliquosa, compressa, bivalvis, 4-locularis, dissepimento 
duplici, membranaceo : valvis primo discedentibus : loculis 
usque gemmatis tardius ad commissuras dorsales v. margi- 
nales dehiscentibus. 
Semina go minuta, pendula, ovata v. cylindracea, nuda aut ra- 
rius in caudam brevem, capillarem utrinque desinentia v. pilos 
longissimos emittentia, glabra rarissime scabra : albumen nul- 
lum. 
Embryo minutus, teres, inversus : cotyledones oblongi embryone 
plus duplo breviores : radicula superior, cylindracea. 
per ennnes^ terrestres^ acaides rarius caulescentes v. fru- 
tices parasitic^ foliis oppositis integerrimis coriaceis glabris : 
in herbis, folia plerumque radicalia^ cordata^ crenata v. ser- 
rata, hirsuta^ in caulescentes terna. Flores umbellati^ pur- 
