216 CACTACEZ OF THE BOUNDARY. 
Page 12 =page 183. M. pectinata is probably not sufficiently distinct from M. radians, DC., and, with it and both the 
following species (M/Z. Echinus aud es scoli cp may belong to Mf. cornifera, DC. ; the two former being the forms without, 
and the three latter those with, ral s 
Page 14= page 183. WM. ca a specimen brought by Dr. Bigelow has flowered. The flower greatly resembles 
that of M. pectinata, figured on Plate XI. , but is more of a reddish than yellow tinge. Dr. Poselger assures me that they also 
vary with white or whitish flowers. Jf. h tberculosa is po ee identical with MM. strobiliformis, Scheer in Salm, Hort. Dyck 
(1850), as I have ascertained by a careful examination of the original specimen (now dead) in the collection of Prince Salm. 
r. Scheer’s name, having oe priority, must be substituted tr min 
= page 186. M. heteromorpha, Scheer in Hor Druk, 1850, is the same species, to judge from the “skeleton” 
of the original specimen in eal: Salm. — Anhalonium. As = genera of Cactacee are now constituted, Anhalonium will prob- 
ably better be kept distinct from hintiaeti A second section of the genus, with flattened tubercles arranged into ribs, would 
comprise Echinocactus Williamsii, Lem. The tufts of dense wool on this plant do not represent the (absent) spines, but are 
axillary productions, surrounding and partly including the flower and fruit. The ovary is perfectly naked, as in other Anhalonia 
or Mamillarice, which has already been noticed by ot rare rs. The in etait Leuchtenbergia Principis, Fisch., may fees have 
to be reduced to a third section of this genus. The flowers being borne just below the tip of the nascent tahindles ich, 
when full grown, are 3 to 6 or 7 sl long, saieatti ti or awl-shaped, and bear at the tip several flat flexible nee in [75] 
place of spines), the plant can have no affinity with Cereus. If the ovary should prove to be naked, the large flower and 
elongated tube would not be sufficient to separate it from Anhalonium. My. Labouret, in his ‘‘ Monographie des Cactées,” 
Paris (without date, probably 1853), page 162, notices the position of the flower. I have seen the young buds below the apex 
the tubercle at Kew, and the scar left by the fallen fruit at Mr. Haage’s in Erfurt, but could not meet with either flower or 
fruit itself. —_A. fissuratum is very nearly allied to the Mexican 4. sulcatum, Salm (A. Kotchubei, Lem.), of which it seems no 
_ 
living nor dead specimen is at present extant in Europe. The upper surface of the tubercle of A. sulcatwm is said to be deeply 
grooved, the groove being filled with silky tomentum ; otherwise the tuber cles a are cae to be sm 
age 21— page 188. Fig. 12 exhibits the enlarged funiculi, which consist of a loose juicy teal It seems that in most 
Cuctacee the funiculi toward maturity become large and juicy. Usually pak =e then burst, and form the so-called pulp, in 
which the seeds are described as nestling, — ‘‘ semina nidulantia. 
Page 23, line 14 = page 190, line 6. It ought to have been mentioned that the lower central spine is as long as the 
others, or more pai greatly exceeds them. 
== page 192. J. horizonthalonius. Numerous original specimens of this plant, living and dead, examined in 
European collections, sates no doubt of the entire aceeaehd of the different forms, which can scarcely be counted as varieties. 
e 200, line 6. C. pentalophus is erect, ‘10-15 inches high,” only when so trained. It [76] 
grows naturally like C. Satine tart C. procumbens, and C. Ehrenbergii, Pfeif., all of which los resemble one another 
habit. C. pentalophus has a 5-angled stem of bright green color, with short spines ; C. Ehrenbergii is usually 6-angled, pale 
green, with numerous long and setaceous spines. Flower and fruit of either seem to be unknow 
age 39, line 21 = page 200, line 45. The root of young plants forms a single globose abe: in older ones it consists 
of a cluster of several oval or shore tubers, sometimes 6 or 8 in number, 1-14 inch in diameter and 2-3 inches long. 
Page 39, line 29 = page 200, line 52. After “family,” add: ‘‘or the specimen observed by Dr. Poselger offered one of 
those rare anomalies (one of cat found by Zuccarini in Cereus serpentinus, was figured by him in the Annals of the Munich 
Academy) where the ovary actually forms the continuation and termination of a trench: by which the sagacious observer just 
mentioned was induced to = the so-called ovary of Cactacee itself a branch, with the real ovary immersed in it. But how 
would he view it in Mamillaria 
Page 41, line 13 = page ni line 1. This is C. Pottsii, Salm, Hort. Dyck, a later name. 
Page 46, line 26 = page 205, line 28. Cultivated specimens of 0. grandis are erect, because, tied to the stake, they are 
not permitted to grow otherwise. Their white spines seem to grow dark very soon, and the smaller number and greater distance 
of the spines may be owing to the influence of cultivation. There is therefore scarcely a permanent character left to distinguish 
the new species from this one. 
ine 8 = page 206, line 7. This margin is the enlarged and indurated funiculus itself, which, by a lateral 
expansion, aviliks the seed proper and forms its exterior bony coating. This dilatation of the funiculus takes place long 
before the flowering period ; it covers the ovulum so completely that only two small lateral openings remain, which lead to the 
orifice. After Mr. Payen and others bad already noticed this expansion of the — Dr. Caspary, of Bonn, lately has more 
eS . investigated its nature. It appears that in many if not in all other Cactacew, the funiculus is bent over ee ap of 
the ovalu ey covering it (I have seen it in some Mamillarie, Echinocacti, “cal Cerei) ; but that only in Opunti 
expands into an exterior seminal coat, which is distinguished from arillus proper only by its being already fully Gras [77] 
at the flowering period. 
Page 58 = page 213. 0. arborescens seems to be very closely allied if not identical with 0. rosea, DC., and 0. imbri- 
cata, DC. The former is described from a figure ; the flower and fruit of the latter remain unknown, —so that it is difficult if 
not impossible at present to solve these doubts. 
Page 59, line 30 = page 214, line22. 0. Wrightii Sed not be different from 0, KZeinie, DC., from Mexico, long cultivated 
in Europe, tha Bower of Which does not seem to be kno 
60, line 21 = page 204, line 53. 0. pana seems identical with 0. gracilis, Hort. Monae, and 0. virgata, Hort. 
Vind., the flower and fruit of which are unknown. It is stated that the spines of 0. gracilis are not vaginate. This is no doubt 
