400 COMPOSITAE 
3. Matricaria matricarioides (Less.) Porter. Pineapple Weed. Fig. 5687. 
esse ey apne ishngssas Fl. Amer, Sept. 520. 1814. Not Matricaria suaveolens L. 
Less. Linnaea 6: 210. 1831. 
Matricaria discoidea DC. Prod. 6: 50. 1837. 
Matricari tri ides Porter, Men. Torrey Club 5: 341. 1894. 
Pineapple-scented, nearly glabrous annuals 1-3 dm. high, usually much branched from the base, 
the leafy striate stems divaricate or asce ane. < aves 1-5 cm. long, bipinnatifid with short, linear, 
acute divisions, longer than the ede qualling ony heads rayless 
rather stout peduncles, 0.5-1.5 cm. long; iain ede about 3 igh; phyllaries subequal, broadly 
, with scarious mar entral, brownish or greeni : k-fl r 
- long, yellowish green, 4 ; receptacle gh, narrowly dome-shaped 
to conical; achenes 1 , asymmetrical, usually ae sya’ oe on the inner face and 
having 2 marginal nerves, the outer fac th and usually ro , the margins bearing linear, 
brown, glandular lines ne eke or completely the scemtly of the body of the achene and not 
extending nto the minute pappus 
A common sO weed of waste gh ane cultivated exons throughout the Jig ne States; probably a 
native oF Voestera North — and ong hl sewhere in the United States and Europe. Type locality : 
Unalaska. Collected by Cham Rayless Cham en 
4. Matricaria occidentalis Greene. Valley Pineapple Weed. Fig. 5688. 
Matricaria occidentalis Greene, Bull. Calif. Acad. 2: 150. 1886. 
Chamomiilla occidentalis Rydb. N. Amer. Fl. 34: 232. 1916. 
Rather stout (rarely slender), glabrous, not strongly scented () annuals 1.5—5. = dm. high, 
the 
single-stemmed or branching from the base, stems normally erect, branched above the middle 
with erect or ascending branches. Leaves 1-6 cm. long Baca with aes eee ere divi- 
sions, somewhat longer than the internodes or equaling them; hea ess, few to several on 
stout peduncles 1-3 cm. long; Sichese 4(3) mm, high; phyllaries sancaa broadly oblong to 
oval, with scarious margins and a central, reenish or brownish area; disk-flowers tig 1.25 mm. 
long, asi iel green, 4-toothed ; ‘receptacle about 8 mm. high beet in depauperate specimens, 
dome-shap: ometimes nar rrowly so phibe about 1 mm. long, asymmetrical, with usually 2 
distinct, wing- like, whitish nerves on the i ng r face, 2 marginal aie are topped by the elliptic or 
oblanceolate glands extending to the crown, and 1 rather indistinct nerve on the slightly rounded 
outer face; pappus-crown a A short bist distinct lobes, each bearing brown glands that obits d 
slightly on the body of the 
In vernal pools and fields in prin pesca’ — top Joaquin Valleys and in valleys of ml Inner Coast Ranges 
~~ Pag a weed in other Pacey Por ead County, Oregon, and Eureka, Humboldt Cou California, and in 
n California. Type locality: not definitely prin but collected by Greene in Contra vai and Solano Coun 
peti California. April-May. 
Much resembling M. oteicavisites but differing in the distinctive achene characters and growth habit. 
103. SOLIVA Ruiz & Pav. FI. Peruv. Prod. 113. pl. 24. 1794. 
Small, diffusely branched annuals. Leaves alternate, petioled, bi- or sepinnately parted. 
Heads few- t to: many-flowered, —> e in the leaf-axils. Phyllaries thin, free, rotate, s sub- 
equal, in 2 series. Receptacle convex or low-conic, ee d. Ma al flower le heads 
either broad w, margina wings produced above (in ours) into cuspidate tips that 
are free from the persistent, spine-like style. [Name in honor of Salvador Soliva, a Span- 
ish physician. 
A genus of 9 species, natives of temperate South America. Type species, Soliva sessilis Ruiz & Pav. 
Wings of the achenes en BS on 
Wings of the achenes ea ceioinaly lobed near the base. ica Seroshiotid 
Soliva — Ruiz & Pav. Common Soliva. Fig. 5689.. 
Soliva sessilis Ruiz & Pav. Fl. Peruv. Prod. 113. ne 24. 1794. 
Gymnostyles chilensis cane Syst. 3: 500. 182 
Soliva daucifolia Nutt. Trans. Amer. Phil. Soc. a: sf 403. 1841. 
Soliva microloma Phil. Anal. Univ. Chile 27: 331. 1865. 
Fibrous-rooted annual, stems few to s aca from the base, 3-20 cm. long, 2 ager oes 
tomously bravakins, the branches Sane thinly villous throughout. Leaves 1-4 c on 
brs Be dissected into narrow oblanceolate lobes, t the blade orbicular to oval in outline, the 
: 1 
flowered ; phyllaries 2-2. a enw. broadly ovate and abruptly acute, thin, green above and 
hyaline below : Serta ip vere fertile, margi inal in 2 or 3 series; central flowers 2-4. 
sterile, subeylindric ; body of the achenes 2-2.5 or more long, — in — planoconvex, 
ispidulous on surfaces, sometimes becom glabrate, the wing rved, ver 
narrow to nearly 1 mm. wide at its ele width, ip be Sa and meat ces. sometimes 
