338 SOUTH AMERICAN BOTANY. 
An examination of Dunalia acnistoides will show how very in- 
timately Dunalia is allied to Acnistus. In the latter genus, the 
filaments are generally flattened below the middle, and gradually 
expanded towards the point of insertion, and if we conceive the 
dilated margins to become split, or torn away from the central 
portion, we should find an Aenistus, thus, at once, converted into 
a Dunalia: there appears to me, indeed, no other difference . 
between this and the typical species, where the flowers are 
numerously aggregated, and Acnistus; in the other spinescent 
species, where the flowers are few or solitary, the dissimilitude in 
habit is very remarkable. On this account it will probably be 
desirable to divide Dunalia into two sections :—1st. CoNFERTI- 
FLOR, containing 1. D. solanoides; 2. D. acnistoides; and 
2nd. PaucrrLorz, containing 3. D. Zycioides, 4. D. brachyacantha, — 
5. D. senticosa, and 6. D. ramiflora, enumerated below. 
$. ConFERTIFLORA. 
2. Dunalia acnistoides, (n. sp.) : inermis, ramis striatis, glaber- 
rimis; foliis alternis, (floriferis geminis vel ternis) elliptico- 
oblongis, acutiusculis, imo in petiolum longum gracilem canicula- 
tum attenuatis, utrinque glaberrimis, supra glanduloso-pruinosis 
subtus pallide glaucis, rachi prominente nervisque pinnatis ruben- 
tibus: floribus in axillis superioribus plurimis (circiter 20), fas- 
ciculato-aggregatis, petiolo æquilongis, pedunculis filiformibus 
calyceque glabris, corollæ tubo glabro calyce 4-plo longiore; lobis 
brevibus, extus tomentosis; staminibus inclusis, infra 
insertis, appendicibus filamento glabro tertio brevioribus, imoque 
tubi pubescentibus; stylo glabro vix exserto.—Huanaco, Peruviæ. 
v. s. in herb. meo (Mathews, No. 849, * Lycium spathulatum” 
dicta). 
This plant so exactly resembles an Acnistus, and possesses S0 — 
little the appearance of a Dunalia, that I did not doubt the cor- 
rectness of Mathews’s decision when on a former occasion I ad 
ferred it to Acuistus spathulatus (Lond. Journ. Bot. vol. 1v. 
p. 341). Although much resembling in habit the Zycium spatht- — — 
latum of the Flora Peruviana, the flowers are far more numerous — — 
