Common Name: LEGUME FAMILY Habit: Annual to tree. Leaf: generally alternate, generally compound, generally stipuled, generally entire, pinnately veined Inflorescence: generally raceme, spike, umbel or head; or flowers 1--few in axils. Flower: generally bisexual, generally bilateral; hypanthium 0 or flat to tubular; sepals generally 5, generally fused; petals generally 5, free, fused, or lower 2 +- united into keel (see 3, Key to Groups, for banner, wings); stamens 10 or many (or [1], 5, 6, 7, 9), free or fused or 10 with 9 filaments at least partly fused, 1 (uppermost) free; pistil 1, ovary superior, generally 1-chambered, ovules 1--many, style, stigma 1. Fruit: legume, including a stalk-like base (above receptacle) or not. Seed: 1--many, often +- reniform, generally hard, smooth. Genera In Family: +- 730 genera, 19400 species: worldwide; with grasses, requisite in agriculture, most natural ecosystems. Many cultivated, most importantly Arachis, peanut; Glycine, soybean; Phaseolus, beans; Medicago, alfalfa; Trifolium, clovers; many orns. Note: Unless stated otherwise, fruit length including stalk-like base, number of 2° leaflets is per 1° leaflet. Upper suture of fruit adaxial, lower abaxial. Anthyllis vulneraria L. evidently a waif, a contaminant of legume seed from Europe. Laburnum anagyroides Medik., collected on Mount St. Helena in 1987, may be naturalized. Ceratonia siliqua L., carob tree (Group 2), differs from Gleditsia triacanthos L. in having evergreen (vs deciduous) leaves that are 1-pinnate (vs 1-pinnate on spurs on old stems, 2-pinnate on new stems) with 2--5(8) (vs 7--17) 1° leaflets, commonly cultivated, now naturalized in southern California. Aeschynomene rudis Benth. , Halimodendron halodendron (Pall.) Voss (possibly extirpated), Lens culinaris Medik. are agricultural weeds. Caragana arborescens Lam. only cult. Ononis alopecuroides L. , Sphaerophysa salsula (Pall.) DC. all evidently extirpated. Cercidium moved to Parkinsonia; Chamaecytisus to Cytisus; Psoralidium lanceolatum to Ladeania. eFlora Treatment Author: Martin F. Wojciechowski, except as noted Scientific Editor: Martin F. Wojciechowski, Thomas J. Rosatti.
Common Name: CLOVER Habit: Annual, perennial herb, unarmed. Leaf: generally palmately compound; stipules conspicuous, partly fused to petiole, generally papery or membranous; leaflets generally 3, occasionally 5--9, +- toothed or wavy. Inflorescence: raceme (generally umbel-like), head, or spike, axillary or terminal, generally many-flowered, generally involucred, generally peduncled; inflorescence bracts 0 or forming vestigial ring or involucre; flower bracts present or not. Flower: generally spreading to erect, generally becoming reflexed; corolla generally purple to pale lavender, occasionally yellow, persistent after flower; 9 filaments fused, 1 free. Fruit: generally indehiscent but generally breaking, short, plump, generally enclosed in corolla; base generally stalk-like. Seed: 1--6. Species In Genus: +- 300 species: temps, tropical mountains, northern hemisphere, South America, Africa; foodplant for lepidopterans, cultivated as green manure in crop rotation, fodder. Etymology: (Latin: 3 leaves) eFlora Treatment Author: Michael A. Vincent & Duane Isely Reference: Ellison et al. 2006 Molec Phylogen Evol 39:688--705; Vincent 2009 Madroño 56:208 Unabridged Reference: Gillett 1980 Canad J Bot 58:1425--1448; Zohary & Heller 1984 Genus Trifolium
Trifolium obtusiflorum Hook.
NATIVE Habit: Annual, generally robust, glandular-hairy, generally sticky. Stem: erect. Leaf: cauline; stipules deeply cut; leaflets 2--4 cm, +- narrowly elliptic, sharply serrate, longer teeth +- 1 mm. Inflorescence: head-like, 1.5--3 cm wide; involucre cut < 1/2 to base. Flower: calyx 9--11 mm, glandular-hairy or bumpy (occasionally in age glabrous), tube slitting between upper lobes, lobes +- <= tube, generally entire, bristle-tipped; corolla 14--18 mm, pale lavender to dull purple, tips white. Seed: 1--2. Chromosomes: 2n=16. Ecology: Moist disturbed areas, gravel bars, marshes; Elevation: 30--1800 m. Bioregional Distribution: NW, n&c SN, CW, SCo, SnGb, PR; Distribution Outside California: southwestern Oregon. Flowering Time: Apr--Jul Jepson eFlora Author: Michael A. Vincent & Duane Isely Reference: Ellison et al. 2006 Molec Phylogen Evol 39:688--705; Vincent 2009 Madroño 56:208 Index of California Plant Names (ICPN; linked via the Jepson Online Interchange) Previous taxon: Trifolium monanthum subsp. tenerum Next taxon: Trifolium oliganthum
Botanical illustration including Trifolium obtusiflorum
Citation for this treatment: Michael A. Vincent & Duane Isely 2012, Trifolium obtusiflorum, in Jepson Flora Project (eds.) Jepson eFlora, https://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=47144, accessed on February 28, 2021.
Citation for the whole project: Jepson Flora Project (eds.) 2021, Jepson eFlora, https://ucjeps.berkeley.edu/eflora/, accessed on February 28, 2021.
MAP CONTROLS 1. You can change the display of the base map and layers by clicking on the layer control box in the upper right-hand corner.
2. California county polygons can be turned off and on in the layer control box.
3. Filling of Jepson subdivision polygons can be turned off and on in the layer control box.
4. Moving the cursor over any numbered cluster will show the range boundary of the included specimens (with a blue polygon).
5. Marker clustering can be turned off by clicking this link:
Marker Clustering OFF WARNING: Turning this off might cause maps with large numbers of specimens to load slowly.
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).
Data provided by the participants of the
Consortium of California Herbaria.
MAP LEGEND View all CCH records All markers link to CCH specimen records. The original determination is shown in the popup window.
Blue markers indicate specimens that map to one of the expected Jepson geographic subdivisions (see left map). Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
READ ABOUT YELLOW FLAGS
CCH collections by month
Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa, if there are more than 1 infraspecific taxon in CA.
Blue line denotes eFlora flowering time (fruiting time in some monocot genera).