CompositcE.] 
CALIFORNIA. 
145 
Ord. XXVI. composite. Juss. 
1. Borkhausia Lessingii; raclice pereniii multicipi, caule scapiformi glabro simplici uiii- 
floro, foliis glabris anguste -linearibus pinnatificlis laciniis brevibus remotis, involucri foliolis 
planis obtiisiusculis margine scariosis extus hirsutiusculis. — Troximon apargioides. Lessing 
in Linneea, v. Q.p. 501. 
This is certainly the plant of Lessing-, agreeing- both -with specimens received from him, and now in Dr, 
Hooker’s Herbarium, and with his description ; but since in the true species of Troximon, the pappus is harsh 
and persistent; while in our plant, it is soft and very caducous as in Sonchus, we have referred it to Borlihausia, 
notwithstanding the different involucrura which most species of that geifiis possess. The achenia are atten- 
uated into a long beak, which is dilated at the apex, forming- a disc for the reception of the pappus and florets. 
In Troximon, although usually described with a sessile pappus, or, in other words, without a beak to 
the achenium, there is really a short beak, by which, and by the different kind of involucre, that genus 
seems principally distinguished from Leontodon. 
1. Lygodesmia minor. Hook. FI. Bor. Am. v. 1. p. 295. t. 103. f. A. (fruct.) 
1. Sonchus oleraceus. Linn. 
1. Eupatorium 
We have seen but one specimen, and that in a very bad state, presenting- only a branch of the inflor- 
escence. The upper part of the stem is herbaceous and quadrangular. The flowers are in panicled corymbs. 
Involucre of 4 or 5 oblong, obtuse, striated and whitish leaflets, furnished at the base with about as many 
short scales, similar to the involucre. Flowers very few in each capitulum. Achenia linear, glabrous, 
with about five angles, formed by as many prominent nerves. Pappus capillary, scabrous at the base, at the 
apex incrassated and slightly plumose. A detached leaf, probably not belonging to the specimen, accom- 
panied it in the Collection. 
1. Madia viscosa. Cav. Ic. v. 3. t. 298. 
Of this there are two varieties in the Collection ; x. resembling the figure above quoted ; and /3. with the 
leaves not above half-an-inch long and half-a-line wide, disposed copiously along the branches, and some- 
what erect. The whole plant is slender and small, scarcely exceeding eight or nine inches, so that probably 
this variety is caused by growing in a dry and poor soil. In habit it is very different from the common 
variety. 
1. Erigeron Canadensis. Linn. 
1. Solidago Canadensis ; caule herbaceo liispido erecto, foliis lanceolatis utrinque attenu- 
atis serratis scabris, racemis paniculatis secundis recurvis, radio abbreviato. Spr. — Linn . — 
Spreng. Syst. v. 3. p. 539. 
The specimens in the Collection vary, with the leaves oblongo-lanceolate and slightly acuminated, with 
the stem and leaves nearly glabrous, and with the racemes so contracted as to lose the secund and recurved 
appearance described above. We, however, possess intermediate forms. The leaves are always more or 
less conspicuously three-nerved, with a few distant narrow deep serratures, or teeth, which point upwards. 
2. Solidago petiolaris ; caule herbaceo adscendente, foliis obovatis in petioliun decurren- 
tibus serratis, racemis erectis densis, involucri foliolis oblongis appressis, radio discuin sub- 
superante. — Ait. — Spreng. Syst. v. 3. p. 541. Lessing in Linncea, v. 6. p. 502. 
Leaves and stem, in one specimen, scabrous, with a short greyish pubescence : in the others, they are 
almost entirely glabrous. 
T 
