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- name Helianthus and Latin - ella, diminutive Treatment appears in FNA Volume 21. Treatment on page 114. Mentioned on page 65, 66, 67. Perennials, 20–150 cm8 KB (578 words) - 23:09, 29 July 2020
- barbellate, apically attenuate bristles in 1 (–3) series. x = 8, 7, 5, 13, 18, 21. North America, Mexico, West Indies, Central America, South America, e Eurasia62 KB (1,546 words) - 15:28, 15 December 2020
- L. Welsh Basionym: Pusillae Standley in N. L. Britton et al., N. Amer. Fl. 21: 50. 1916 Treatment appears in FNA Volume 4. Mentioned on page 355. Leaves3 KB (480 words) - 09:36, 30 July 2020
- pappus, alluding to membranous pappus scales Treatment appears in FNA Volume 21. Treatment on page 309. Mentioned on page 395. Biennials or perennials, to9 KB (558 words) - 23:45, 29 July 2020
- alternate. > 21 21 Leaf blade margins entire, sometimes margins of distal leaves proximally toothed; calyx lobes subulate; seeds 1–4. Melampyrum 21 Leaf blade19 KB (841 words) - 19:24, 29 July 2020
- root alluding to resiniferous rootstocks Treatment appears in FNA Volume 21. Treatment on page 93. Mentioned on page 65, 95, 100. Perennials, 10–45 (–100)13 KB (768 words) - 23:05, 29 July 2020
- distance to costa at insertion. Drepanocladus 21 Paraphyllia usually present; rhizoids often forming tomentum > 22 21 Paraphyllia absent; rhizoids rarely forming21 KB (586 words) - 07:42, 30 July 2020
- Mithridates Eupator, King of Pontus, 132–63 B.C. Treatment appears in FNA Volume 21. Treatment on page 462. Mentioned on page 459, 461, 470, 471. Perennials,17 KB (791 words) - 22:42, 29 July 2020
- Echinochloa 20 All leaves with ligules, ligules membranous or of hairs. > 21 21 Paleas of the lower florets inflated and indurate at maturity; lower and21 KB (1,188 words) - 03:56, 30 July 2020
- alluding to spiny tips of receptacular paleae Treatment appears in FNA Volume 21. Treatment on page 88. Mentioned on page 43, 64, 65. Perennials, to 140 cm10 KB (797 words) - 23:04, 29 July 2020
- Treatment appears in FNA Volume 9. Treatment on page 347. Mentioned on page 21, 351. Shrubs; unarmed. Leaves alternate, simple; stipules persistent or caducous4 KB (267 words) - 14:16, 30 July 2020
- names: Starry rosinweed IllustratedEndemic Treatment appears in FNA Volume 21. Treatment on page 81. Mentioned on page 77, 78, 82. Illustrator: Yevonn Wilson-Ramsey6 KB (601 words) - 23:02, 29 July 2020
- placenta, wings absent, rarely present. x = 7. North America, nw Mexico Species 21 (21 in the flora). The flowers in Collinsia resemble those of Fabaceae subfam16 KB (737 words) - 19:04, 29 July 2020
- Etymology: Ancient Latin or Greek plant name Treatment appears in FNA Volume 21. Treatment on page 366. Mentioned on page 3, 5, 255, 257, 364, 365, 375. Perennials16 KB (834 words) - 23:57, 29 July 2020
- Treatment appears in FNA Volume 9. Treatment on page 392. Mentioned on page 21, 395. Shrubs; unarmed. Leaves alternate, sometimes opposite, pinnately compound5 KB (307 words) - 14:23, 30 July 2020
- lanceolate, 5-21 × 1.5-6 cm, base cuneate, apex acute to acuminate. Flowers 2.5-5 cm diam.; peduncle 1-11 cm; bracteoles 3-6; tepals 21-33, red-maroon4 KB (443 words) - 08:24, 30 July 2020
- Treatment appears in FNA Volume 26. Treatment on page 307. Mentioned on page 20, 21, 58, 204, 303, 308. Herbs, perennial, from tunicate bulbs. Leaves basal; blade5 KB (350 words) - 05:59, 30 July 2020
- names: Sneezeweed Etymology: For Helen of Troy Treatment appears in FNA Volume 21. Treatment on page 426. Mentioned on page 415, 416. Annuals or perennials13 KB (702 words) - 15:32, 15 December 2020
- jepsonii 18 Leaf blade margins entire, dentate, denticulate, or serrulate. > 21 21 Leaf blade margins entire or remotely denticulate, teeth if present minute14 KB (504 words) - 18:27, 29 July 2020
- evolution in the Artemisia ludoviciana complex of the Pacific Northwest. Brittonia 21: 29–43. Keck, D. D. 1946. A revision of the Artemisia vulgaris complex in11 KB (598 words) - 20:49, 29 July 2020