Rosacea.] 



CALIFORNIA. 



139 



floribus subverticillatis majusculis. — Pursh, FL Am. v. 2. p. 468. De Cand. Prodr. v. 2. p. 

 108. Eschscholtz, in Linncea, v. 3. p. 151. Hook. Fl. Bor. Am. v. I. 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. sericeus 

 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, suffruticose y 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. Spirace;e. 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 ce 

 subglobosae. Pistillum 1. Ovarium obovato-cylindraceum, uniovulatum ? apice oblique 

 truncatum pubescenti. Stylus lateralis, vix calycem longior, flexuosus. Stigma obtusum, 

 subincrassatum. 



1. Adenostoma fasciculata. (Tab. XXX.) 



Frutex rigidus glaberrimus ramosus; rami stricti subvirgati. Folia fasciculata lineari-filiformia rigida 

 brevissime petiolata basi stipula minutissima sufFulta. Fasciculi foliorum etiam stipulati, stipula bifida. 

 Flores fasciculati in spicam interruptam terminalem aphyllam congesti, parvi, albi ; bracteis plurimis parvis 

 subimbricatis, ovatis, acutis, rigidis, exterioribus saepe 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 Spiraa, 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 

 shrub, glabrous in every part, with upright twiggy branches clothed with greyish-brown bark. 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 Monterrey. 



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. G, Inner view of a portion 

 of the flower, to show the glands ; fig. 7, Petal ; fig. 8, Stamen ; fig. 9, Pistil : — all 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 very distinct species from the H. congesta of Douglas and Hook, in Bot. Mag. t. 2880, and has 

 been well described by Chamisso and Schlechtendal in the Linncea. 



1. Photinia arbutifolia ; foliis oblongo-lanceolatis distanter dentatis, pedicellis calyce 

 brevioribus. Lindl. Pdmac. in Linn. Trans, v. 12. p. 103; et in Bot. Reg. t. 491. De Cand. 

 Prodr. v. 2. p. 631. — Cratsegus arbutifolia. Ait. Hort. Kew. ed. 2. v. 3. p. 202. 



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