430 
MEXICO— SUPPLEMENT. 
{Tiuhiacea. 
patentibus. Stamina 4. AntliercB oblongss, vix exsertse. Stylus longe exsertus. Stigma bifidum, laciniis 
patentibus vel recurvis. Capsula membranacea, calycis dentibus erectis rigidis coronata, bilocularis, loculis 
raonospermis, matiira paullo infra medium circumseisse dehiscens “ scissurm planum utrinque a dissepiraento 
declive, sic ut pars decidua angulo fere recto appareat excisa.” (Schlecht.) Semen ovali-subquadratum, fere 
hemisphsericum, brunneum, cruciatim quadrilobum, lobis linea transversali emarginatis. 
This plant, as well as the other individuals of the genus, have so much the habit of Spermacoce, that, with- 
out a careful examination of the fruit, the distinction is not evident. But there a remarkable difference is 
observable, which has given rise to the generic name. The capsule is a pyxidium, separating into two por- 
tions, not indeed exactly transversely, but with an angle somewhat resembling that of a V inverted, and the 
upper half, shaped like a mitre, falls away, frequently carrying the seeds along with it, which are detached 
from the dissepiment that remains in the lower half {fig. 4, 5.) The seeds are extremely curious, and judg- 
ing from the figure in the Linneea, very different from those of M. Humboldtianum, one of the species on 
which the Genus was founded. — Stems and branches dark-coloured. 
Tab. XCIX. A. Mitracarpum Schizangium — Fig. 1. Flower; fig. 2. Fruit; fig. 3, 4. Capsule with 
the two portions separated ; fig. 5. Front (or inner) view of a seed ; fig. 6. Back view of ditto ; fig. 7. Side 
view of ditto : — magnified. 
2. M.. pallidum ; herbaceum erectum, ramis elongatis flexuosis, foliis ovato-lanceolatis 
acutiusculis basi in petiolum attenuatis utrinque scabro-puberulis, stipulis birsutis spinoso- 
setigeris, floribus axillaribus verticillatis et terminalibus capitatis 4-pbyllis, fllamentis 
exsertis, seminibus — ? 
Hab. Realejo. — This, although very nearly allied to the preceding, is certainly a distinct species ; it is 
herbaceous, with an annual root. The stem is erect, and, as well as the elongated branehes, of a singularly 
pale colour, and glossy ; they are rounded, with 4 but little elevated lines, thus indistinctly quadrangular, 
very slightly downy. The leaves are broader, softer, and more decidedly petiolated, equally long in general, 
but the uppermost ones, those forming a sort of involuere beneath the terminal head of flowers, are shorter. 
The stems are one foot and a half to two feet long. The specimens have no fruit. 
1. Crusea parviflora; elata berbacea, ramis elongatis gracilibus divaricatis, foliis ovato- 
lanceolatis tenuibus in petiolum attenuatis birsutulis, umbellis capitatis terminalibus 
tetrapbyllis, pedicellis calycis lobis basi sericeo-villosissimis, ovario didymo lobis disjunctis, 
calycis tubo supra ovarium maxime constricto. (Tab. XCIX. C.) 
Hab. Acapulco. 
Caulis herbaceus, erectus, tetragonus, gracilis, glaber, nitidus, bi-tripedalis et ultra, ramosus. Rami 
oppositi non raro subverticillati, divaricato-patentes, filiformes, internodiis elongatis. Folia opposita, brevis 
petiolata, 1-2 uncias longa, ovato-lanceolata, tenui-membranacea, acuta vel acuminata, basi cuneato-attenuata, 
glabra vel villosula, subtus pallidiora, penninervia, nervis oblique subparallelis. Stipidce latae, mem- 
branaceae, glabriusculse, setis inaequalibus appressis rigidis marginatae. Flores parvi, umbellato-capitati, 
capitulis hemisphaericis semiunciam latis, involucratis, involucre tetraphyllo, foliolis sessilibus ovato-lanceo- 
latis, 3-5-nerviis, duobus oppositis triple minoribus, majoribus unciam longis : intra flores setis vel paleis 
plurimis angustis villosis. Pedicelli pilis longis sericeis hirsutissimi. Calycis tubus glaber, ob formam ovarii 
inferne didymus, superne insigniter constrietus, dein in limbum 4-lobum profunde 4-partitum dilatatus. Lim- 
bus basi membranaceus, hirsutissimus, albus; laciniis elongatis, lineari-spathulatis, herbaceis, acutis, ciliatis. 
