Rosacea.^ 
CALIFORNIA. 
139 
floi’ibus subverticillatis majusculis. — Pursh, FI. Am. v. 2. p. 468. De Cand. Pwdr. v. 2. p. 
408. Eschscholtz, in Linncza, v. 3. jo. 151. Hook. FI. Bor. Am. v. \. p. 164. 
This, along with the preceding, has long lain in our Herbarium undescribed, the gift of the generous 
Menzies, who gathered it in California, and probably at San Francisco. It is, without doubt, the L. sericms 
of Eschscholtz, and probably too of Pursh; though we have no authentic specimen to confirm this opinion. 
It is among the most beautiful of the genus, small, suffi-uticose, densely leafy, often throwing out numerous 
short branches, and every where, except the corolla, clothed with densely appressed aureo-nitent silky hairs. 
The flowers are described by Eschscholtz as yellow, though in the dried state, as that author observes, they 
become tinged with purple. 
Ord. XVI. ROSACEA. 
(Sect. SpiracEjE. De Cand.) 
ADENOSTOMA. Nov. Gen. 
Calyx infundibuliformis, inferus, coriaceus, 5-angulatus, 5-fidus, lobis rotundatis brevibus 
mucronulato-acutis : tubi ore glandulis quinque transversim oblongis carnosis munito. 
Petala 5, subrotunda, vix unguiculata, paten tia. Stamina 15 erecto-patentia. Anther m 
subglobosse. Pistillum 1. Ovarium obovato-cylindraceum, uniovulatum ? apice oblique 
truncatum piibescenti. Stylus lateralis, vix calycem longior, flexuosus. Stigma obtusum, 
subincrassatum. 
1. Adenostoma fasciculata. (Tab. XXX.) 
Frutex rigidus glaberrimus ramosus; rami strict! subvirgati. Folia fasciculata lineari-filiformia rigida 
brevissime petiolata basi stipula minutissima suflfulta. Fasciculi foliorum etiam stipulati, stipula bifida. 
Flores fasciculati in spicam interruptam terminalem aphyllam congesti, parvi, albi ; bracteis plurimis parvis 
subimbricatis, ovatis, acutis, rigidis, exterioribus ssepe divisis. 
It is to be regretted that we do not possess perfect fruit of this plant, which we consider as unquestionably 
belonging to the Natural Order Rosacea, and very different from any genus yet described. In habit, it 
perhaps comes nearest to some species of Spiraea, yet the flowers are abundantly different : the calyx being 
furnished with five conspicuous fleshy glands or scales at the mouth, and the germen remarkably and obliquely 
truncated at the extremity, and there and there only very pubescent. It constitutes apparently a small rigid 
sliruh, glabrous in every part, with upright twiggy branches clothed with greyish-brown hark. The leaves 
are small and always fasciculated, the fascicle, as well as each individual leaf, being subtended by a stipule ; 
that of the latter is bifid. Flowers in an interrupted terminal leafless spike, clustered, with many small 
imbricated bractece at their base. It grows in sandy plains in the Bay of Monteri’ey. 
Tab. XXX. Adenostoma fasciculata. Fig. 1, Fascicle of leaves ; fig. 2, Single leaf; fig. 3, Flower-bud ; fig. 4, 
Expanded flower ; fig. 5, Flower, from which the petals have fallen away ; fig. 6, Inner view of a portion 
of the flower, to show the glands ; fig. 7, Petal ; fig. 8, Stamen ; fig. 9, Pistil : — aU more or less magnified. 
1. Horkelia Californica; foliis radicalibus pinnatis 5-7-jugis, foliolis late cuneato-obovatis 
profunde serratis, calycis laciniis exterioribus 3-dentatis, petalis calyce brevioribus. — Cham, 
et Schlecht. in Linncea, v. 2. p. 26. 
This is a veiy distinct species from the H. congesta of Douglas and Hook, in Bot. Mag. t. 2880, and has 
been weU described by Chamisso and Schlechtendal in the Linncea. 
1. Photinia arhutifolia; foliis oblongo-lanceolatis distanter dentatis, pedicellis calyce 
brevioribus. Lindl. Pomac. in Linn. Trans, v. 12. jo. 103; et in Bot. Reg. t. 491. De Cand. 
Prodr. V. 2. p. 631. — Crataegus arbutifolia. Ait. Hort. Kew. ed. 2. v. 3. p. 202. 
S 2 
