Flower achene

The leaves are simple, spiral and 4-7 cm X 5-8 mm. The blades of basal leaves are ellipticat and the cauline ones are linear-lanceolate. The inflorescence consists of numerous umbels spreading to form a large, loose panicle. The flowers are bright yellow. The achenes are oblong, brown, and prominently ribbed (Fig. 18). 

Features Stem up to one foot high. Leaves alternate, divided pinnately into linear segments. Flowers large, yellow, solitary at termination of stem. Oval head of achenes succeeds flower. 

Small trichomes are found on various flower parts, for example, the base of the corolla, the upper portion of the immature achene, the stigma, pappus, and bracts (Figure 4.3). 

The fruit developed from a single female flower is either a fleshy drupe or a dry achene. The flowers fuse as they mature after fertilization, and a multiple fruit forms. The multiple fruit consists of small drupes or ach-enes grouped together in a single unit, and is usually round or oval shaped. 

The best known fruit of the Moraceae is that of the common fig Ficus carica), which has been cultivated for thousands of years. These cultivated figs develop without pollination, as this species does not produces male flowers. It is actually the synconium that is referred to as the fruit of the fig. In the case of fig varieties which are pollinated, the true fruit, an achene, develops inside the synconium. Figs are pollinated by wasps. 

Synconium—The hollow, fleshy structure in figs which houses the flowers and is often incorrectly referred to as the fruit. The true fruit often has the achenes borne inside the synconium on the female flowers. 

Description Herbaceous annual or biennial, 30-90 cm tall, covered with long, white, raised hairs. Stems single or multiple, erect, branched. Lower stem leaves petiolate, tripartite-pinnatisect, 3-7 cm long cauUne leaves sessile, tripartite. Inflorescences 3-5-flowered capitula in panicles. Disk flowers yellow, punctate glandular ray flowers absent. Fruits obo-vate achenes, 2-2.25 mm long, olive-colored. 

Description Herbaceous annual or biennial plant with a thin vertical root. Stems single or few, 30-90 cm tall. Basal leaves petiolate, bi- or tripinnatisect, segments linear-lanceolate, apex acute middle cauline leaves smaller, sessile, segments narrow, linear upper cauline leaves deeply tri-lobed or entire. Inflorescences small capitula with 10-12 flowers, in a wide, nodding panicle involucral bracts brownish or pink-violet. Disc flowers yellow ray flowers absent. Fruits achenes, ca 0.6 mm long, ovate, flat with narrow ribs. 

Description Herbaceous annual with a taproot. Stems 20-110 cm taU. Leaves opposite, lower and middle tripartite upper leaves unlobed, lanceolate. Inflorescences capitula, single or in groups of 2-3 involuoal bracts ovate or lanceolate-ovate, internal bracts shorter. Flowers yellow, usually only disc type. Fruits dark brown achenes, flattened with 4 edges, often with retrorsely barbed awns. 

Description Herbaceous annual. Stems erect or suberect, tomentose. Basal leaves petiolate, blades broadly spatulate in outline, 1-3-dissected, segments linear. Flowers solitary, terminal. Sepals 5, 2-8 mm long, spreading, tomentose. Petals 5, yellow. Frnits achenes in ovoid clusters. Achenes 4.5-6.5 mm long, with a straight, sharp beak. 

Other distinguishing features Leaves glandular and slightly or densely hairy. Ray flowers sterile, 3-lobed. Achenes slightly... 

---