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2 Inflorescence a panicle, of > 25 flowers (6-40 in Pyracantha); leaves leathery, evergreen. |
3 Plants armed with thorns |
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4 Pomes purplish-black, 7-10 mm in diameter, each with 3-5 seeds; leaves mostly 10-30 cm long |
4 Pomes orangey yellow, (10-) 20-30 mm in diameter, each with 1-2 seeds; leaves (2-) 4-10 cm long |
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5 Upper surface of leaves bearing dark glandular trichomes along the midrib (most easily seen with a 10× hand lens); shrubs |
5 Upper surface of leaves lacking dark glandular trichomes along the midrib; shrubs and trees. |
6 Ovary and fruit 10- locular; inflorescence a raceme (rarely a fascicle); pome < 1 cm in diameter |
6 Ovary and fruit 5- locular; inflorescence a cyme, umbel, or fascicle (lacking an elongated central axis); pome 0.7-10 cm in diameter. |
7 Styles distinct; exocarps (carpels within pericarp) bony and seedlike; trees and shrubs, with thorns |
7 Styles usually connate at base; exocarps leather or papery and easily opened to expose seeds; small trees, unarmed, or armed with sharp spur branches. |
8 Pome globose to ovoid, lacking stone cells; anthers yellow to white; styles connate at the base; leaves blunt to acuminate; [apples and crabapples] |
8 Pome globose or pyriform, with stone cells; anthers reddish; styles distinct; leaves acute to acuminate; [pears] |
1 Ovary superior; fruit dehiscent (aggregate of follicles, or capsule) or indehiscent ( drupe, aggregate of drupelets, aggregate of achenes). |
9 Leaves opposite; fruit an aggregate of usually 3-5 purple to black drupelets; [tribe Kerrieae] |
9 Leaves alternate; fruit various (see below; if an aggregate of drupelets, then with >5 drupelets). |
10 Leaves large, > 10 cm wide, palmately veined, palmately lobed; fruit an aggregate of drupelets; [tribe Rubeae] |
10 Leaves smaller, < 8 cm wide, pinnately veined, either not lobed or basally pinnately lobed; fruit a drupe, a capsule, an aggregate of follicles, or an aggregate of achenes. |
11 Leaves singly serrate or entire (rarely, as in Prunus americana, irregularly and slightly doubly serrate), not lobed basally. |
12 Gynoecium of separate carpels; fruit an aggregate of follicles; [tribe Spiraeeae] |
12 Gynoecium of fused carpels; fruit either a fleshy drupe or a capsule. |
13 Ovary 5-angled in ×-section; fruit a 5-angled capsule; leaves obovate, obviously broadest towards the tip; [tribe Osmaronieae] |
13 Ovary circular in ×-section; fruit a fleshy spherical drupe; leaves generally broadest near or below the middle; [tribe Amygdaleae] |
11 Leaves doubly serrate, also often lobed towards the base. |
14 Corolla yellow; stems arching, green; fruit an aggregate of drupe-like achenes (dry and indehiscent); [tribe Kerrieae] |
14 Corolla white to pink or rose; stems not both arching and green; fruit various (see below). |
15 Inflorescence a dense, umbel-like corymb; leaf apices rounded to acute; fruit an aggregate of 5 follicles; [tribe Neillieae] |
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16 Fruit a single follicle; [ exotic, planted, and rarely naturalized, as in e. VA]; [tribe Neillieae] |
16 Fruit an aggregate of 2-4 drupe-like achenes; [rare native of calcareous habitats in sc. TN, nw. GA, n. AL, and disjunct westward in AR and MO]; [tribe Kerrieae] |
