CONTRIBUTIONS TO BOTANY. 
37 
latum subamplexicaulem decurrentibus, bine quasi sessilibus, 
cauli subscaposo sequilongis; caulinis paucis, multo minoribus ; 
caule ssepius pedunculo unico longiusculo monocephalo ter- 
minato, interdum ramo altero foliifero et florifero donato j 
involucri foliolis 5-7, lanceolatis, acutis, pectinato-dentatis, 
dentibus spinulosis ; paleis basi latis, apice subulatis. — Prov. 
Mendosse ad Tortoral et Las Arboletas, in arenosis, v. s. in 
herb. Hook. (Gillies, sub nom. C. spinulosa). 
Planta humilis, 3-3^ poll, alt.; radix fusiformis; folia plera- 
que radicalia, 2| poll, long., 4-7 lin. lat., imo cuneato-spathu- 
lata; caulina 9-12 lin. long., 3-4 lin. lat.; caulis saepe scapi- 
formis, fere nudus, 3 poll. long. ; capitulum 9 lin. diam. ; invo- 
lucri foliola 5-6 lin. long., 2 lin. lat. ; achaenium 1^ lin. long., 
5-angulatuni, spinis inaequalibus, divaricatis, longioribus 5-8 liii. 
long., subulatis *. 
Var. /3. serratifolia ; — foliis elliptico-lanceolatis, submenibrana- 
ceis, sinuato-serratis, dentibus calloso-mucronatis, imo integro 
cuneatis, 5-7-nerviis, glaberrimis; caule scapiformi, solitario 
(an semper ?), monocephalo, nudo, foliis radicalibus breviore ; 
paleis integris, acutis. — In Andibus Mendozinis, v. s. in herb. 
Hook.-, circa Casa Pintada (Gillies). 
Polia majora, textura tenuiora, 4 poll, long., 1 poll, lat., imo 
Integra, latiora; scapus 2 poll, alt.; capitulum circa 1 poll, 
diam. 
6. Acicarpa. 
This genus, first established by A. de Jussieu, was named by 
him Acicarpha f, because of the spinose lobes of its achsenia, 
which he erroneously attributed to the growth of the paleae, and 
their accretion with the ovarium. Mr. Robert Brown first de- 
tected this error, and showed that the spinose excrescences were 
owing to the growth of the calycine lobes, and not of the paleae; 
and hence he objected to the name of Acicarpha as being inad- 
missible, suggesting in its stead the far more appropriate epithet 
of AcicarpaX- DeCandolle and other botanists have disregarded 
this suggestion, and have retained Jussieu’s name ; but it appears 
to me that we are bound to adopt that of Acicarpa, so long ago 
recommended by 'Mr. Brown. The little difference existing 
between this genus and Calycera has been already pointed out, 
consisting principally in the much greater length of the excres- 
cent calycine lobes, and in the accretion of the achsenia with 
each other and with the receptacle ; but this last-mentioned 
* This plant is figured in Plate 50 d. 
t Ann. Mus. ii. p. 347. 
J Linn. Trans, xii. p. 132; Mem. Mus. vi. pi. 11 & 12. fig. b. 
