510 



ELATINACEAE 



Rofs.— llYPERici'M roRMOSUM U. B. K. Nov. Gen. & Sp. 5:196, t. 4G0 (1821), type loc. 

 Pa/.ouaro, Mow, Ilumholdi <)"• Bonphvul (I'f. Kow Bull. Misc. Inform. 1924:25). Var. scouleri 

 Coulter, Bot. Gaz. 11:108 (l'88t3). II. scouleri Hook. FI. Bor. Am. 1:111 (1838), type loc. North- 

 west Coast near the Columbia Kiver, IScoulcr, Douglas; Jepsou, Fl. W. Mid. Cal. 235 (1901), 

 cd. 2, 2Ci3 (1911), Man. C38 (1925). 



5. H. concinnum Benth. GoLD-wraE. (Fig. 243.) Stems wiry, numerous 

 from the woody crown, formin*]: a busliy plant 6 to 11 inches hijjh; leaf -blades 

 thickish, linear to lanceolate, acute, inserted by a narrow base, usually folded, 

 scantily black-dotted, % to 1% inches long; flowers % to 1% inches broad, in 

 rather close clusters at summit of the stem; se- 

 pals ovate, somewhat abruptly short-pointed; 

 petals obovate, black-dotted on the margin; sta- 

 mens numerous, 4 of the filaments in each of the 

 3 clusters distinctly united at base, the others 

 free. 



Dry brushy mountain slopes and ridges, 500 

 to 3000 feet : North Coast Ranges from Marin Co. 

 to ^Mendocino Co.; Sierra Nevada foothills from 

 Mariposa Co. to Shasta Co. June-July. 



Locs. — North Coast Ranges: Mt. Tamalpais, Jepson; 

 "Weldon Caiion, Vaca Mts., Jepson 7193; Howell Mt. foot- 

 hills, Jepson 2433 (petals in full anthesis reflexed) ; Knox- 

 ville, Napa Co., Jepson; Sonoma Geysers, Brewer 3948; 

 Miyakma Eange (e. of Ukiah), Jepson 3015; Potter Val- 

 ley, Mendocino Co., Hohnan. Sierra Nevada: Greeley Hill 

 near Coulterville, H. M. Evans; Columbia, Tuolumne Co., 

 Jepson 6420; Angels Camp, Alice King; Wallace, w. Cala- 

 veras Co., Jepson 10,035; New York Falls, Amador Co., 

 Hansen 32; lone, Braunton 1003; Blue Canon, Placer Co., 

 H. A. Wallcer 1285; Brush Creek, Butte Co., Conger; 

 Lamoine, Shasta Co., BlanMnship. 



Refs. — Hypericum concinnum Benth. PI. Hartw. 300 

 (1848), type Hartweg 394, type loc. given as "Sacramento 

 Valley", but probably collected in the northern Sierra 



Nevada foothills in Nevada Co. (cf. Ervthea 5:55) ; Jepson, Fl. W. Mid. Cal. 235 (1901), ed. 2, 

 263 (1911), Man. 638, fig. 631 (1925). ' 



ELATINACEAE. Water-wort Family 



Small annuals with opposite leaves and membranous stipules between them. 

 Flowers 2 to 5-merous, small, perfect, symmetrical, solitary in the axils. Sepals, 

 petals and stamens all distinct and hypogynous. Ovary with as many cells as there 

 are sepals; styles distinct. Capsule 2 to 5-celled, septicidal or the partitions more 

 or less persisting with the axis; placentae central. — Genera 2 and species 30, all 

 continents. 



Bibliog. — Seubert, M., Elatinarum monographia (Nov. Act. Nat. Cur. 21^:33-60, tt. 2-5, — 

 1845). Gray, A., Elatines americanae (Proc. Am. Acad. 13:361-364, — 1878). 



Flower-parts 2 to 4; sepals obtuse, without midrib 1. Elatine. 



Flower-parts 5 ; sepals pointed or acute, with thickened midrib and scarious margins... .2. Beroia. 



1. ELATINE L. Water-wort 

 Glabrous dwarfs, somewhat succulent, growing in water or in wet places, root- 

 ing at the nodes. Leaf-blades entire. Flowers 2 to 4-merous. Sepals submem- 

 branous, obtuse. Petals white or whitish. Capsule globose, thin-membranous, 2 

 to 4-celled, several- or many-seeded. Seeds striately and regularly reticulated. — 

 Species 10, all continents.' (Greek, etymology obscure.) 



Flowers sessile ; flower-parts 3 or 2 ; seeds straight or nearly so. 



Flower-parts mostly 2 ; petals equal 1. E. americana. 



Flower-parts mostly 3 ; petals unequal 2. E. hrachysperma. 



Flowers pediceled; flower-parts 4; seeds strongly curved 3. E. calif orniea. 



Fig. 243. Hypericum concin- 

 num Benth., fl. branchlet, X 1. 



